The steel pipe pile is composed of steel pipe, tongue-and-groove grooves and tongue-and-groove pins. The left end pipe wall of the diameter of the steel pipe is vertically connected with grooves and grooves. The cross section of the grooves is a box shape with one side open. The side of the steel pipe is provided with reinforcing ribs, the right end of the pipe diameter of the steel pipe is vertically connected with a tongue-and-groove pin at the position of the off-radius, and the groove section of the tongue-and-groove pin is an I-shaped.

In the utility model, when the cofferdam is used, the steel pipe piles overlap each other in an arc or circle shape. It can play the role of surrounding water, surrounding soil, and surrounding sand. The tongue-and-groove steel pipe pile of the utility model has the advantages of novel design, simple structure, convenient use, easy overlap and good sealing performance. Including non-circular cross-sectional contours, uniform wall thickness, variable wall thickness, variable diameter and variable wall thickness along the length, symmetrical and asymmetrical cross-sections, etc. Such as square, rectangle, cone, trapezoid, spiral tube, etc.