Positioning device for fire detection

The utility model belongs to the technical field of fire-fighting detection equipment, and particularly relates to a positioning device for fire-fighting detection, which comprises a base, a first square frame is fixedly connected to the top of the base; the inner side wall of the first square frame is slidably connected with a second square frame. The inner side wall of the second square frame is slidably connected with a third square frame. Sliding grooves are formed in the four corners of the first square frame and the four corners of the second square frame. Sliding rods are fixedly connected to the four corners of the second square frame and the four corners of the third square frame correspondingly. The outer side wall of the sliding rod is slidably connected to the groove wall of the sliding groove. A clamping piece is arranged on the side wall of the sliding rod; the base is provided with a group of universal wheels; fixing pieces are arranged on the universal wheels; the side walls of the first squar