1, from the functional point of view: xlsx file format has more functions and features than xls, such as more advanced formulas and functions, data validation, conditional format and so on. , which is more suitable for scenes that deal with a large amount of data and need more complex functions.

2. From the perspective of compatibility, most modern versions of MicrosoftOffice software (such as Excel2007 and higher) support xlsx file format, which is also better in compatibility.

3. From the security point of view: xlsx file format is more secure, supports digital signature and encryption, and can better protect the data in the file.