Locking device for tubular pile steel die

The utility model provides a locking device, which is used for a tubular pile steel die. The locking device is provided with an upper half die and a lower half die, and is characterized by comprising a first closing plate, a second closing plate, a stop dog, a guide device and a slider, wherein the first closing plate is arranged at the end part of the junction of the lower half die and the upper half die along the longitudinal direction of the tubular pile steel die, the second closing plate is arranged at the end part of the junction of the upper half die and the lower half die along the longitudinal direction of the tubular pile steel die and corresponds to the first closing plate in position, the stop dog is fixed on the lower half die, the guide device is in a groove shape and is provided with two opposite side walls which are fixed on the second closing plate and the upper half die respectively, and the slider is clamped between the two side walls of the guide device in a slidable manner. After the lock