Testing device for overdue service device and use method of testing device

The invention relates to the technical field of relay protection device testing, and discloses a testing device for an overdue service device and a using method thereof.The testing device comprises an upper shell, a lower shell and a testing module used for testing a relay, and the upper shell and the lower shell are closed to form a testing fixing cavity; the elastic assemblies are connected to the two sides of the lower shell correspondingly, each elastic assembly comprises a guide column, a clamping block, a limiting rod, a first elastic piece and a second elastic piece, the clamping block is provided with a guide hole and a clamping limiting hole, the guide column is located on one side of the lower shell, one end of the guide column is connected to the outer bottom plate, and the first elastic piece is connected to the periphery of the guide column in a sleeving mode; the clamping block is connected to the peripheral face of the lower shell, the guide column is connected to the guide hole, the limiting r