In order to test the transmission performance of cross magnetic gear which used to the production line for flat, the test system is set up. Transmission performance in different materials, spaces, pole numbers and loads are studied. First, after analyzing the traditional test system, according to the testing requirements, the overall test system is established. The installation of the transmission components and sensor in test system are determined. And then transmission, data acquisition systems and analysis software are designed. Finally, in order to verify the performance of testing system, experiments under same loads and different spaces to compare the transmission torque are done. The results showed that the system met the requirements of testing reliable, high precision, strong anti-interference for the 42mm diameter of NdFeB magnetic gear during the process of 1:1 cross magnetic gear transmission testing. The torque testing accuracy is up to 0.01Nm and the relative error can be controlled within 0.82%.
