Trailer bottom plate welding positioning device

The utility model discloses a trailer bottom plate welding positioning device which comprises a base, two fixing blocks are symmetrically arranged at the upper end of the base, the lower end of the fixing block located on the left side is fixedly connected with the upper end of the base, an installation block is fixedly installed at the upper end of the base, a through opening is formed in the installation block, and a through hole is formed in the through opening. The right side of the fixing block located on the right side is fixedly connected with a rack plate, the right end of the rack plate penetrates through the through opening and is fixedly connected with a push handle, and the push handle is elastically connected with the adjacent face of the mounting block through a reset spring. According to the device, through arrangement of a rack plate and a clamping block, bottom plates of different sizes can be rapidly clamped, so that the machining efficiency of bottom plate welding is ensured, and meanwhile,