Mounting jig of clamping support

The utility model relates to the technical field of assembly and test of mobile phones, and discloses a mounting jig of a card holder, which comprises a connecting block, a connecting rod fixedly mounted at the top end of the connecting block, a frame mounted at the top end of the connecting rod, an inclined push block mounted on the side of the frame, a main body pressing block movably mounted at the top end of the frame, and a clamping block mounted on the main body pressing block. A first X-direction positioning device is installed on one side of the top end of the frame in a sliding mode, a second X-direction positioning device is installed on the other side of the top end of the frame in a sliding mode, and a card holder body is arranged between the first X-direction positioning device and the second X-direction positioning device. After the SIM card and the card support are accurately positioned respectively, the SIM card is assembled into the card support; after the test is completed, the SIM card is t