A tool specialized for hoisting a polished rod rotator of an oil pumping unit is an auxiliary tool in oil field production. The tool specialized for hoisting the polished rod rotator of the oil pumping unit settles some problems in production of oil field. The tool is obtained through connecting the following components: a round steel shaft, wire rope clamps, a roller, spacing semicircular devices and a rope sleeve. The roller is sleeved at the central part of the round steel shaft. Two ends of the roller on the round steel shaft are respectively provided with a spacing semicircular device. Wire rope clamps are respectively welded at two ends of the round steel shaft. The rope sleeve passes through the spacing semicircular devices and are sleeved on the roller. The length of the roller is 40-50millimeter. The inner diameter of the roller is larger than an external diameter of the round steel shaft. Furthermore the roller can be rotated. The tool specialized for hoisting the polished rod rotator of the oil pumping unit has the following advantages: simple structure, high convenience in use, high convenience, high speed and easy operation. Furthermore unsafe factors in exchanging the polished rod rotator according to other methods are eliminated, thus saving construction time and shortening shutdown time, thereby improving production-to-time ratio of the oil well.