The invention discloses an MVB-bus-based joint testing system for rail transit vehicle control equipment. The MVB-bus-based joint testing system comprises n vehicle control equipment parts, and testing environment system parts and MVB/network gateways in one-to-one correspondence with the vehicle control equipment parts, wherein the testing environment system parts are interconnected through a preset network, the MVB/network gateways are interconnected through the preset network according to a vehicle assembly network typology of the corresponding vehicle control equipment parts, and each MVB/network gateway is connected with the corresponding testing environment system part through the preset network; each testing environment system part is used for simulating a control object of the corresponding vehicle control equipment part and an operating environment of the target vehicle; and the MVB/network gateways are used for converting MVB bus signals of the vehicle control equipment parts into corresponding network signals. The MVB-bus-based joint testing system realizes the effect of carrying out remote system joint tests of finished-vehicle level on all vehicle control equipment distributed in different regions, reduces the debugging risk, shortens the debugging period, and improves product reliability.