The utility model provides a position device was prevented to high voltage circuit breaker branch, combined floodgate. It includes spacing turning arm and locating pin, wherein the back tip of spacing turning arm utilizes the pivot to fix the opposite position of transmission turning arm in the transmission case, and the front portion is formed with an elongated slot, the one end of locating pin is fixed on the outer end upper portion of transmission turning arm, and insert in the elongated slot of spacing turning arm the outside. The utility model provides a position device was prevented to high voltage circuit breaker branch, combined floodgate has following beneficial effect: compare with the stop device of other structures, this structure is more simple, the stop device of other structures generally install in the mechanism with the middle transmission link, the separating brake arranges separately with the spacing needs of combined floodgate that spacing an organic whole of divide -shut brake can be realized to this device, has reduced intermediate link in addition, the good reliability, has improved product production efficiency, sparingly manufacturing cost at time of save material and debugging.