License plate fixing and sealing device for non-motor vehicle

The utility model discloses a number plate fixing and sealing device for a non-motor vehicle, and relates to the technical field of number plate fixing and sealing devices, the number plate fixing and sealing device comprises a fixing ring, a locking ring is arranged at the top end of the fixing ring, a mounting ring is arranged at the bottom end of the locking ring, a through hole is formed in the bottom end of the mounting ring, and an arc-shaped groove is formed in the top end of the mounting ring; a limiting column is fixedly installed at the top end of the fixing ring, a cavity is formed in the locking ring, the limiting column penetrates through the through hole, one end of the limiting column is located in the cavity, a steel ball is arranged in the position, located in the cavity, of the locking ring, an iron ring is arranged at the top end of the steel ball, a containing groove is formed in the side end of the limiting column, and the iron ring is arranged in the containing groove. The steel ball is