The utility model provides a steel sheet pile corner structure. The steel sheet pile corner structure comprises a first steel sheet pile, wherein a second steel sheet pile is welded to the outer side of a web plate of the first steel sheet pile. The included angle between the web plate and the second steel sheet pile is formed. The second steel sheet pile comprises a steel plate, wherein one end of the steel plate is welded to the outer side of the web plate of the first steel sheet pile, the other end of the steel plate is provided with a wing plate, the included angle between the wing plate and the steel plate is formed, and a locking opening which is matched with each buckling edge of the first steel sheet pile is formed in the end edge of the wing plate. A fixing piece is arranged on the connection portion between the first steel plate pile and the second steel plate pile. The buckling edge and the locking opening are respectively connected with one steel sheet pile in a buckled mode. The steel sheet pile corner structure has the advantages of being good in adaptability, simple in structure, economical and the like. In addition, the steel sheet pile corner structure can well adapt to the current situation of practical construction and is good in application prospect.