Buried pipe pay-off device for water conservancy project

The invention provides a buried pipe pay-off device for a water conservancy project. The buried pipe pay-off device solves the problems that an existing buried pipe pay-off method is low in working efficiency, and when a cable is too long, the cable is prone to bending in a pipeline and cannot move forwards. The device comprises an outer cylinder, square adjusting holes are formed in the front side, the rear side, the upper side and the lower side of the outer cylinder correspondingly, adjusting lead screws are slidably arranged in the four adjusting holes correspondingly, walking wheel shaftsare fixed to the ends, located on the outer side of the outer cylinder, of the four adjusting lead screws correspondingly, and walking wheels are rotationally arranged at the other ends of the four walking wheel shafts correspondingly; outer tooth internal thread bushings which are coaxial with the four adjusting lead screws and are in threaded fit with the four adjusting lead screws are rotationally installed on the inn