The invention provides a testing device for a communication module, and belongs to the technical field of communication module testing. The device comprises a plurality of groups of data ports, a communication unit, a master control unit and a to-be-tested communication module, wherein the plurality of groups of data ports are used for being electrically connected with ports of different communication modules; the communication unit is used for receiving external testing data; the master control unit is used for determining the type of the testing data, and sending the testing data to a corresponding data port; the to-be-tested communication module is connected to the master control unit through a corresponding data interface; and the master control unit is used for sending the testing data to the to-be-tested communication module for testing. According to the testing device, the testing data are sent to the to-be-tested communication module through the corresponding data port, therebyrealizing automatic testing of all types of communication modules in one testing system, lowering the detection cost and labor cost of a detection system, shortening the detection time, and increasing the shipping rate of a power inspection department.