The invention discloses a crane vertical hoisting and positioning system. The crane vertical hoisting and positioning system comprises a tower crane, a hoisting machine and a hoisting basket. A laserpositioning device is mounted on the hoisting basket. The laser positioning device comprises a laser module, a charging and discharging controller, a storage battery and a box. The laser module and the storage battery are electrically connected with the charging and discharging controller. The laser module comprises a power adapter and a laser head. Laser emitted by the laser head passes through the bottom surface of the box and is irradiated vertically downwards. The laser positioning device can move along with movement of the hoisting basket. Correspondingly, the laser emitted downwards by the laser head and a light beam formed by the laser can also move. On this basis, the light beam can markedly give a warning to pedestrians. Moreover, a tower crane driver can judge the position of thehoisting machine by observing the light beam and determine the rising and falling position of a hoisting hook of the hoisting machine. Through the crane vertical hoisting and positioning system, theoperation safety of the tower crane is improved, and the hoisting accuracy is ensured. The crane vertical hoisting and positioning system is applied to the field of high-altitude construction.