Improved Larsen steel sheet pile and construction method thereof

The invention relates to the field of building construction, in particular to an improved Larsen steel sheet pile and a construction method thereof.The improved Larsen steel sheet pile comprises a pile plate, side plates connected to the two sides of the pile plate and hanging lugs fixed to the two ends of the side plates, a locking assembly is arranged at the connecting position of every two adjacent hanging lugs and comprises an end plate, and two embedded plates are fixedly arranged on the lower surface of each end plate; each group of embedded plates comprises two embedded plates, the two embedded plates of each group are opposite to each other and are spirally arranged so as to embed the hanging lugs between the two embedded plates, an elliptical insertion rod is fixedly arranged at the center position of the bottom of the end plate, and the insertion rod is used for being inserted into the butt joint center position of the two groups of hanging lugs and abutting against the center side walls of the hang