1. An incremental upgrade method for a file, comprising: reading ZIP data information of an APK file, wherein the ZIP data information is a ZIP data header and/or a ZIP directory table; acquiring an APK eigenvalue of the APK file according to the ZIP data information, wherein acquiring the APK eigenvalue of the APK file according to the ZIP data information comprises: filtering APK sub-files of the APK file, according to the ZIP data information, to obtain APK sub-files that do not meet one or more filtering conditions according to name, size or creation time of the APK sub-files contained in the ZIP data information; and performing a calculation on the ZIP data information of the obtained APK sub-files that do not meet the filtering condition to obtain the APK eigenvalue of the APK file; and performing an incremental upgrade on an APK base file corresponding to the APK eigenvalue according to the APK eigenvalue.