The invention relates to the technical field of crane mechanical components, in particular to a crane for water conservancy project construction. The crane comprises a cylinder barrel, a column body is inserted to the lower end of the cylinder barrel, a supporting plate is connected to the lower end of the column body, side plates are connected with the two sides of the supporting plate, one sideof each side plate is connected with a connection rod, and the bottom of the supporting plate is provided with a base plate. Column holes are formed in the two sides of the bottom end of the column body, the bottom of the column body is provided with a notch, one side of the notch is provided with a semicircular groove, and the two ends of the supporting plate are provided with connection ports. The supporting plate is hinged to the column body, the supporting plate is freely rotated, the side plates are connected to the two sides of the supporting plate, the side plates can be adjusted to theangle adapting to a site, a bolt is fixed to a fixing block so as to be rightly attached to the ground to play a supporting pole, and crane lateral turning is prevented; and site flattening is not needed, time and labor are saved, supporting is stable and firm, and early-stage preparation work of the crane is greatly simplified.