EXCEL files will keep some operation records in the file during use, and there will also be some information that you can't find (such as a line, a graphic and other misoperation). Both account for the size of the file.

Although you deleted the normal contents of the file, you still can't delete the above information, so the file will be larger.

But if you make a new file and put the main contents of the table in it, the information on it will no longer be stored in it, and the file will naturally become smaller.