Self-closing type safety protection door lock device

The utility model relates to the technical field of door lock devices, in particular to a self-closing type safety protection door lock device which comprises a first shell and a second shell, the first shell and the second shell are oppositely arranged in the left-right direction, and the opposite side end faces of the first shell and the second shell are respectively provided with a lock assembly and a clamping groove which are matched with each other; the lock assembly comprises a through groove formed in the first shell in a left-right penetrating mode, a sliding frame is arranged at the end, facing the second shell, of the through groove, a sliding block is slidably connected to the interior of the sliding frame, and a rotating disc is rotatably connected to the end, away from the second shell, of the through groove. According to the self-closing type safety protection door lock device, the defect that in the prior art, a protection door of an engineering elevator can be automatically opened due to bumpi