The utility model relates to a borehole operation tool, and particularly relates to an anti-blocking and falling object preventing tubing coupling and a sand washing stylus device using same. The device comprises a tubing coupling body, a tubing nipple and a blocking piece, wherein a stylus is arranged at the bottom end of the tubing nipple; the blocking piece is fixedly arranged on the inner wall of the tubing coupling body. Compared with the prior art, the device has the advantages that the use cost can be saved, the construction efficiency is improved, simultaneously as no holes for mounting the blocking piece is formed in the tubing nipple, the strength of the tubing nipple is enhanced, and the strength of the stylus is further enhanced.