The invention belongs to the field of petroleum drilling, in particular to an underground turbine power laser drilling tool. The underground turbine power laser drilling tool comprises a power source outer barrel, a stator blade, a rotor blade, a turbine shaft, sealing rings, a generator outer barrel, a stator, a rotor, a limit joint, a current transformer, an optical fiber laser, a combiner, an optical fiber, a drill bit body and a laser head. The stator blade and the rotor blade are connected with the turbine shaft and of an up-down two-stage structure, two O-shaped sealing rings are respectively arranged above and below the generator outer barrel, the stator and the rotor coact to produce electric energy, the current transformer is arranged at the lower part of the generator outer barrel, the optical fiber laser is arranged at the lower part of the limit joint, and laser produced by the combiner is transported to the laser head at the bottom of the drill bit body through the optical fiber. The underground turbine power laser drilling tool can provide a stable power supply for the optical fiber laser, high-energy laser transmission convergence is guaranteed, an existing drilling technology is not changed, laser and drill bit mechanical combined efficient rock breaking is realized, and petroleum drilling speed is effectively increased.