The invention relates to a grid cooling machine water drenching system which belongs to the field of building material devices. The grid cooling machine water drenching system comprises a water drenching pipe which is communicated with a water supply system, transversely arranged with the movement direction of a clinker and close to the surface of the clinker, the grid cooling machine water drenching system is characterized in that: the water drenching pipe is fixedly connected with a lever structure, a counterweight is fixedly arranged at the other end of the lever structure, and the water drenching pipe can be floated up and down. The water drenching pipe in the grid cooling machine water drenching system can be close to the surface of the clinker as far as possible, thereby leading drenching water to be fully contacted with the clinker and improving the heat exchange efficiency, when in existence of large pieces of the clinker, the water drenching pipe can be lifted, thereby leading the large pieces of the clinker to smoothly pass below the water drenching pipe; furthermore, a water nozzle which is blocked on the water drenching pipe can be easily cleared through the design of a blockage clearing pipeline.