Braking force distribution method and system of multiple train units

A braking force distribution method and system of multiple train units. The braking force distribution method of multiple train units comprises: determining a current car of target multiple train units; calculating current axle loads of axles of the current car; and distributing braking forces of the axles of the current car in a positive correlation manner according to the current axle loads of the axles. In this application, the braking forces of the axles are distributed by using an axle load compensation technology. A braking force exerted by an axle with a low axle load is reduced according to a load-decreasing amount of the axle load, while a braking force exerted by an axle with an increased axle load is increased according to a load-increasing amount of the axle load, so that the braking forces exerted by the axles match the axle loads, thereby optimizing adhesion utilization and ensuring optimal functioning of the total braking force.