Sliding door safety lock catch

The utility model relates to a safety lock catch of a sliding door. Wherein the lock catch is arranged on a sliding door body, and the lock body is arranged on one side of a door frame or a wall body.The lock body comprises a lock shell, a lock cylinder and a connecting rod. A lock cylinder is installed in the lock shell. A driving block is rotationally mounted in the lock cylinder; a driving rodis arranged at the upper end of the driving block; a baffle is arranged in front of the lock shell; a connecting rod is arranged between the baffle plate and the lock shell; one end of the connectingrod penetrates through the baffle and is connected with the switch; the other end of the connecting rod extends into the lock shell and is connected with a driving block; a guide cylinder is installed on one side of the lock cylinder, a limiting column is installed in the guide cylinder in a sliding mode, an extending plate extending into the lock cylinder is arranged on one side of the limitingcolumn, the extending plate