Novel anti-theft sampling valve for oil well

The utility model relates to a novel anti-theft sampling valve for an oil well, which comprises a valve body, screw sleeves, bolts, a piston, a lock bolt, a lock body and a key, wherein the whole body of the novel anti-theft sampling valve is of a cylindrical boss structure, and an intersecting line is arranged at the right end of the valve body; the screw sleeves are in threaded connection with the valve body at the center of the valve body so as to locate the piston which is hard sealed in the valve body; the right end key is inserted into the lock body, and the lock bolt is inserted into the opening of the piston; the two bolts penetrates through the screw sleeve, and the lock body is fixed by the valve body; a blind center hole is arranged in the center of the piston, and a side hole which is communicated with the center hole is arranged at the left side of the piston; and a lock core in the center of the lock body is rotated by the side hole and the oil outlet hole of the piston through the key so as to