If content that needs to be uniformly replaced, such as English abbreviations, numerical codes, and course identifiers, exists simultaneously across multiple docx documents, modifying them one by one in Word is extremely time-consuming. This article uses the batch processing of 1.docx through 6.docx as an example to explain how to use formulas in office software for fuzzy text search, batch matching uppercase letters and numbers with regular expression rules like [A-Z]{3} and \d+, and replacing them with specified content. It is suitable for administrative, academic, legal, and document organization personnel who need to centrally revise Word documents.
In daily office work, you often encounter this kind of problem: a folder contains multiple Word documents, each containing similar English abbreviations, serial numbers, or numerical content that needs to be uniformly replaced with new expressions. If only one document needs replacement, manual operation is acceptable; but when the number of files grows to a dozen, dozens, or even more, opening, searching, replacing, and saving each one individually will take up a lot of time, and it is easy to miss changes.
The solution demonstrated in this article is to use the Word batch find and replace feature in HeSoft Doc Batch Tool , combined with regular expression wildcard formulas to complete batch replacements. Unlike ordinary keyword replacement, regular expressions can match text patterns like "three consecutive uppercase letters" or "consecutive numbers," making them particularly suitable for handling content with patterns in docx and doc documents.
Applicable Scenario: Batch replacing not fixed words, but a type of text
When many users search for "Word batch replace keywords," their real need is not to replace a fixed word, but a batch of content with similar forms. For example, documents might contain three-letter uppercase abbreviations like BOT, ELA, ABC, or numbers like 60, 2024, 001. Their positions in each Word file are different, and the number of occurrences varies, making it difficult to guarantee completeness through manual searching.
The value of regular expressions lies in searching by rules. For instance, [A-Z]{3} can represent 3 consecutive uppercase English letters, and \d+ can represent 1 or more consecutive digits. With the batch processing capabilities of office software, these rules can be applied to multiple Word files at once, thereby completing batch replacement.
Effect Preview: Files and document content before processing
In this example, there are 6 Word documents to be processed in the folder, with the file extension docx. They could be the same batch of course materials, report templates, instruction documents, or business files.

From the Word content before processing, it can be seen that there are multiple targets in the main text that need to be replaced, such as BOT at the beginning of the title, ELA in the main text, and the number 60. They are not all in the same paragraph, nor do they necessarily appear only once, which is precisely where a batch replacement tool is most useful.

Effect Preview: Key content replaced according to rules after processing
After processing, the content matching the rules in the documents has been replaced. In the example, three-letter uppercase words were replaced with A, and numbers were replaced with B. The highlighted positions in the screenshot show the effect after replacement, indicating that the software scanned multiple locations in the document body based on the rules.

This method is suitable for uniformly rewriting codes in a batch of documents, and also for rule-based replacement of sensitive information before delivery. Compared to operating on files one by one, batch processing can significantly reduce repetitive work.
Operation Steps: Setting up batch regex replacement in office software
Step 1: Open the Word Tools category
After launching HeSoft Doc Batch Tool , select "Word Tools" in the left navigation bar. In the interface, you can see multiple functional modules related to Word files. The one used this time is "Find and Replace Keywords in Word". This function's description is about batch finding and replacing keywords in Word file content, which perfectly matches the current need.

After selecting this function, the software enters a wizard-style page. The advantage of the wizard process is that the steps are clear, and the user does not need to search for setting items back and forth between multiple menus.
Step 2: Import multiple docx files
After entering the function page, the first step is to select the records that need to be processed. You can click "Add Files" to select Word documents one by one, or click "Import files from folder" to batch import files from an entire folder. In the screenshot, 1.docx to 6.docx have been imported, a total of 6 records.

In the file list, you can check the name, path, extension, and modification time. After confirming that no wrong files are selected, click "Next" at the bottom. If there are files in the list that do not need processing, you can delete them in the operation column to avoid incorrect documents being affected by the subsequent batch replacement.
Step 3: Choose to use formulas for fuzzy text search
After entering "Set Processing Options", select "Use formulas for fuzzy text search" in the search method. This step determines that the software will match based on regular expression formulas, rather than only searching for completely identical plain text.

In the left "Keywords to find list", enter two lines of rules: the first line [A-Z]{3}, the second line \d+. In the right "Replace with keywords list", enter two lines of replacement content: the first line A, the second line B. In this way, during processing, the software will replace content matching the first rule with A, and content matching the second rule with B.
Pay special attention to the correspondence between lines. The first line find rule corresponds to the first line replacement content, and the second line find rule corresponds to the second line replacement content. If the replacement content is filled in the wrong row, the final result will also be misaligned.
Step 4: Continue to set the save location and start processing
After setting the find and replace rules, click "Next". The subsequent steps in the interface flow are "Set Save Location" and "Start Processing". It is recommended to save the processed files to a new location for easy comparison with the original files. After confirming the settings are correct, start processing and wait for the software to complete the batch replacement.
Common Issues and Notes
Will regular expressions replace too much content? Possibly. For example, \d+ will match all consecutive numbers, including body text numbers, serial numbers, page number references, etc. Therefore, before formal processing, it is recommended to copy a small number of files for a trial run to confirm the replacement results meet expectations.
Can both doc and docx be processed using this approach? The screenshot examples in this article are for docx files. For common Word documents in practical work, you can first confirm the file extension and software support status, then import them into the processing list.
Why use a batch processing tool? Word's built-in find and replace is suitable for single documents, while office batch processing software is more suitable for unified processing of multiple files. Especially when the number of files is large and the rules are consistent, centralized processing can save a lot of manual effort.
Should I check "Ignore Case"? If the rule is explicitly written as [A-Z], it is usually for uppercase letters. If your document also contains lowercase forms, whether to ignore case should be carefully chosen based on the actual replacement target.
Summary
The key to batch replacing uppercase abbreviations and numerical content in multiple docx documents is not to repeatedly open Word, but to set the replacement rules once and hand them over to professional office software for batch execution. Using HeSoft Doc Batch Tool , you can apply regular expression rules to multiple files through the "Find and Replace Keywords in Word" function. It is recommended that users back up the original files, verify the rules, and check the save location before starting processing, then begin the batch process. This can ensure both efficiency and document security.