The utility model provides a reservoir beach storage capacity recovery device based on pipe laying infiltration liquefaction, including the slotted hole pipe, this slotted hole pipe comprises horizontal segment and bending segment two parts, it has a plurality of permeability holes to bore on the pipe wall of the horizontal segment of slotted hole pipe. Arranged the slotted hole pipe in the reservoir, the body is pushed down to silt on the point bar, and the mouth of pipe is near the major trough, then through constantly watering to intraductal for the silt of permeability hole department is constantly liquefied to be taken to the major trough, washes away along with rivers. The silt of reservoir point bar can effectively be clear away through above -mentioned device for storage capacity resumes.