Internal combustion bolt wrench

The utility model relates to a railway maintenance tool, and particularly relates to an internal combustion bolt wrench. The internal combustion bolt wrench comprises an internal combustion engine, a clutch transmission mechanism, a speed reducing transmission mechanism, a reversing mechanism, a torque control mechanism and a working sleeve; an internal combustion engine handle is fixedly mounted on the internal combustion engine; a rail face travelling mechanism is fixedly mounted at the bottom of the internal combustion engine; an operation handle is fixedly mounted on a transmission mechanism box body; the torque control mechanism comprises an upper jack, a lower jack, a spring base, a disc spring, first steel balls, a locking nut and a constant-torque nut; a plurality of trenches are asymmetrically distributed in the upper end face of the lower jack; the cross sections of the trenches are unfolded to be a combined curve formed by sequentially connecting inclined lines, straight lines and arcs end to end;