Secondary fixation anchor nail, including a nail and no. Two nails, a nail is for cylindric, and open at the head end top of a nail has V type incoming line, and a nail of V type incoming line below is gone up to open there was line hole b and crossed line hole a, and V type incoming line communicates with each other with the top of crossing line hole b and is connected, is equipped with the reinforcement barb on the nail, no. Two the nail comprises smooth -going stiff end and gradual change stiff end, no. Two long hexagonal through -hole is led to to inside being equipped with of nail, be equipped with four guide rail an on the outer wall of smooth -going stiff end, be equipped with anticreep barb a between two adjacent guide rail a, the gradual change stiff end from with smooth -going stiff end link to another opening end surface grow gradually, the gradual change stiff end is equipped with the enhancement rib with the junction of smooth -going stiff end, be equipped with four guiderail b on the outer wall of gradual change stiff end, article two, be equipped with anticreep barb b between adjacent two guide rail b, the easy threading of this anchor nail improves the efficiency of operation, and this anchor nail anticreep performance is better simultaneously, and the guide rail on the anchor nail still has the guide effect, improves fixed efficiency.