Software remote upgrading method based on VPN (Virtual Private Network) technology

The invention provides a remote software upgrading method based on a VPN (Virtual Private Network) technology. The method comprises the following steps: establishing a connection network between software application equipment and a software upgrading management platform based on the VPN technology; acquiring software upgrading information by using the software upgrading management platform, and generating a software upgrading information database; the software upgrading management platform compares the software upgrading information in the software upgrading information database with software version information in a preset software version information base to obtain a comparison difference record; the software upgrading management platform downloads and evaluates the software upgrading files according to the comparison difference records, and software upgrading files which are evaluated to be qualified are generated; the software upgrading management platform sends the qualified software upgrading file to th