The invention relates to a surgical path positioner and surgical instruments. The surgical path positioner is assembled at the tail end of a surgical device, and the positioner comprises a first planeand a second plane mutually parallel to each other; a first annular piece is arranged on the first plane; a second annular piece is arranged on the second plane; a first through hole is formed in thecenter of the first annular piece; a second through hole is formed in the second annular piece; the first through hole and the second through hole are configured to allow a scalpel to pass through the through holes and restrict an insert path of the scalpel. The surgical path positioner and the surgical instruments disclosed by the invention have the advantages that the scalpel can be inserted into the skin of a patient according to the path restricted by the surgical path positioner, and positioning deviation of an incision caused by shaking of hands of a doctor is avoided.