The application discloses a kind of bistable press type mechanical self-locking switch, including mounting seat, plug-in rod, press lever, press
handle, reset compression spring and limit ball, mounting seat is equipped with mounting seat through-hole, plug-in rod passes through mounting seat through-hole, plug-in rod is equipped with plug-in rod center through-hole, plug-in rod center through-hole is sequentially first section through-hole, second section through-hole, third section through-hole and fourth section through-hole, the hole wall of fourth section through-hole is equipped with taper through-hole along circumference, the circumferential hole wall of mounting seat through-hole is equipped with ring groove, press lever is located in plug-in rod center through-hole, one end of reset compression spring and press
handle contact, the other end and the step between second section through-hole and third section through-hole contact, taper section and cylindrical section are equipped on press lever, limit ball is placed in taper through-hole.The application realizes the self-locking function of plug-in rod in
insertion and pull-out two states, i.e., realizes bistable self-locking function, can effectively prevent adverse consequences caused by misoperation.