Positioning device for elevator installation

The utility model relates to a positioning device for elevator installation, which comprises a base, a chassis is fixedly installed at the center of the upper end face of the base, a hydraulic cylinder is arranged on the upper surface of the chassis, a disc is fixedly arranged at the output end of the hydraulic cylinder, and a positioning assembly is arranged on the upper surface of the disc. And four telescopic rods are movably arranged in the telescopic sleeve in a sleeved mode, a second side plate is fixedly arranged on the upper surfaces of the ends, away from the telescopic sleeve, of the four telescopic rods, and two first side plates are fixedly arranged on the two outer side faces, away from the telescopic sleeve, of the second side plate correspondingly. The telescopic sleeve and the telescopic rod can adapt to elevator cars of different sizes, the elevator cars can be effectively positioned through cooperation of the first side plate and the second side plate, rolling support can be provided for the