The utility model relates to a transformer substation's secondary insurance is thrown and is stopped device, including two motion arms, two motion arms are articulated through selling the axle, and two motion arm front ends set up the semicircle cambered surface respectively, and the open end of two halves arc surface all sets up towards inboard, all sets up the semicircular handle outside the two motion arm rear ends, and one of them motion arm afterbody sets up the location and detains, and another motion arm afterbody corresponds the location knot and sets up the location orifice plate. Light, the convenient effective and insulating safety of simple structure is thrown when switching operation and is stopped the secondary insurance and use this device can avoid direct to touch the charged body with the hand, and the injury of both having avoided the charged body to lead to the fact the person effectively can make things convenient for the quick insurance of installing again, shortens switching operation's time.