The invention discloses a water conservancy facility. The water conservancy facility comprises a walking trolley and a main engine fixedly mounted in the walking trolley. A first hammering part and asecond hammering part which are arranged in a left-right equal mode are arranged in the main engine, and slipping connection cavities and sunken connection troughs are formed in the first hammering part and the second hammering part correspondingly, wherein the sunken connection troughs are formed in the position, below the slipping connection cavities, of the bottom face of the main engine. Slipping connection blocks are in slipping connection with the interiors of the slipping connection cavities, and hammering plates are in slipping connection with the interiors of the sunken connection troughs. Eccentric wheels are in rotating connection fit with the interiors, above the slipping connection blocks, of the slipping connection cavities, and concave connection grooves are formed in the bottom walls of the interiors of the slipping connection cavities. Rod shafts extending up and down are in slipping connection with the interiors, between the concave connection grooves and the sunken connection troughs, of the main engine, extension sections at the tops of the rod shafts reach into the slipping connection cavities through the concave connection grooves, and the tails of the rod shafts are fixedly connected with the bottom faces of the slipping connection blocks. The water conservancy facility greatly saves the time, effectively sinks a pile body to a designed elevation, does not generate pollution through mechanical driving, and can be conveniently applied and popularized within a large range.