The invention discloses a train traction force and braking force distributing system based on TCMS control. The system comprises a train control and management system (TCMS), a remote input and output module (RIOM), a traction system and a braking system, and the traction system and the braking system are distributed on a train. Compared with the prior art, the train traction force and braking force distributing system has the advantages that the TCMS can directly and comprehensively control various conditions of traction force and braking force distribution of the train, a distributing result on traction force and braking force is output after reasonable operating, the traction system and the braking system are only responsible for executing the result, the train control efficiency is improved to a large degree, and the phenomenon that the traction and braking function cannot be achieved according to needs due to the fact that a controller in the traction system cannot coordinate with other braking systems in time is avoided.