The invention discloses a telephone line tester for communication, comprising a transmitter assembly and a receiver assembly, wherein one side of the transmitter assembly is provided with the receiverassembly; The invention has the beneficial effects that the transmitter main body is surrounded by the designed transmitter protective shell, the receiver main body is surrounded by the designed receiver protective shell, a transmitter main body and a receiver main body fall on the ground, the transmitter protective shell and the receiver protective shell protect the transmitter main body and thereceiver main body, and the impact force is mitigated. By designing a rope and a lock to connect the transmitter assembly and the receiver assembly, the transmitter assembly and the receiver assemblyare conveniently connected by a worker, and the worker can conveniently carry the tester. By designing the dust-proof plug plate of the transmitter and the dust-proof plug plate of the receiver to block the junction of the transmitter and the receiver, the dust and other debris can be prevented from entering the junction, and the normal use of the equipment can be ensured.