Construction method and construction structure of lock catch steel pipe pile

The invention relates to the technical field of constructional engineering construction methods, in particular to a construction method and construction structure of a lock catch steel pipe pile. Concave pipes and convex pipes are welded and fixed to the two sides of a main pipe to form the lock catch steel pipe pile, an opening in the bottom of the concave pipe is closed, the inner side and the outer side of a side face groove are closed through a structure capable of being damaged by a cutting knife respectively, a groove is formed in a construction position, the lock catch steel pipe pile is put down in the groove, and underwater concrete is poured to the two sides of the lock catch steel pipe pile; when adjacent lock catch steel pipe piles are constructed, the cutting knife is used for cutting open the side face grooves, the adjacent lock catch steel pipe piles are put down to enable the convex pipes to enter the concave pipes with the cut open side face grooves, and the two lock catch steel pipe piles ar