The invention provides a 5G-based distributed small base station remote software upgrading system and method. The 5G-based distributed small base station remote software upgrading system comprises a software center, at least one small base station near end and at least one small base station far end, wherein a software agent module is arranged in the near end of each small base station; a softwareupgrading module is arranged in the far end of each small base station; when software upgrading is needed, the software center sends a software upgrading instruction and a to-be-upgraded software program to the near end of the small base station in butt joint with the software center; and the small base station near end completes software upgrading and sends an upgrading instruction and a to-be-upgraded software program to the software upgrading module in the small base station far end in butt joint with the small base station near end, and software upgrading of the small base station far endis completed through the small base station near end. The 5G-based distributed small base station remote software upgrading system solves the problem that in the prior art, the upgrading failure rateis too high due to too large network data during centralized upgrading, and guarantees that a network management system is not impacted by upgrading storms, so that operation is healthier and more stable.