Construction method for rapidly breaking pile head of cast-in-place concrete pile

The invention provides a construction method for rapidly breaking a pile head of a cast-in-place concrete pile. The construction method comprises the following steps that a cast-in-place pile reinforcement cage is manufactured, and a pile head reserved steel bar of the part, embedded into a bearing platform, of the reinforcement cage is wrapped; concrete is poured, and it is ensured that concrete cement paste does not enter the steel bar main reinforcements in the pouring process; and the pile head of the cast-in-place pile is excavated, a line is drawn and marked at the preset position, and a cutting machine and a percussion drill are used for cutting and drilling treatment at the corresponding position till a circle of concrete interface is completely fractured. The method has the advantages that the breaking difficulty of the pile head of the cast-in-place concrete pile can be reduced, the construction quality of the pile head of the cast-in-place concrete pile can be guaranteed, in the implementation proc