Side template vertical support anti-loose device

The invention discloses a side template vertical support anti-loose device. The device comprises a top supporting block, a threaded rod and a base, the top supporting block is used for connecting side templates and located above the base, the top supporting block is connected with the threaded rod in a screw mode, and the lower portion of the threaded rod is inserted onto the base in a penetrating mode; a limit rod is fixedly connected to one side of the threaded rod, and a limit sleeve is fixedly connected to the limit rod; the anti-loose device further comprises a stop pin, a guide hole is formed in the base, the threaded rod penetrates through the guide hole, multiple stop pin holes are evenly distributed in the base in the mode of surrounding the guide hole, and the stop pin holes are matched with the stop pin; when the stop pin penetrates through the limit sleeve and is inserted into some stop pin hole, the threaded rod cannot rotate under the effect of external forces; when the stop pin is not inserted