The utility model is applied to the field of pins, and particularly relates to an anti-drop plugging pin, which comprises a pin body, a plug end is fixedly mounted at the top of the pin body, the top of the plug end penetrates to the outside of a pin guide seat, two sliding grooves are formed in two sides of the top of the pin body, sliding blocks are connected in the four sliding grooves in a sliding manner, and the sliding blocks are arranged in the sliding grooves in a sliding manner. One sides of the two sliding blocks are fixedly connected with elastic pieces, the sides, close to the pin body, of the elastic pieces are fixedly connected with springs, one ends of the springs are fixedly connected to one sides of the pin body, in the process that the pin is inserted into the connector, the elastic pieces are pressed to move in the axial direction of the sliding grooves through the sliding blocks, and the elastic force of the springs gives resistance to the two elastic pieces. According to the utility model, the elastic sheet abuts against the inner wall of the connector, so that the anti-falling effect on the plugging pin can be effectively achieved, meanwhile, the elastic sheet slides along the sliding groove through the sliding block, so that the pin can be conveniently pulled out in the later period, the use is convenient, and the practicability of the plugging pin is improved.