Linear electric puffer for petroleum drilling machine

The utility model discloses a linear electric puffer for a petroleum drilling machine. The linear electric puffer comprises an anti-explosion brake motor, a winch frame, a planetary reducer, a winding drum body, an anti-explosion limiting stopper, an anti-explosion electric control box and an anti-explosion control box. Wherein the anti-explosion brake motor, the speed reducer, the winding drum body and the anti-explosion limiter are coaxially and fixedly connected to the winch frame in a linear mode, an electromagnetic power-off brake is arranged at the tail of the anti-explosion brake motor, and a limiting release button, an overload protector, a scram button and the like are arranged in the anti-explosion electric control system. The electric control box is electrically connected with the anti-explosion brake motor, the anti-explosion limiting device, the emergency stop switch and the anti-explosion control box, and starting and stopping of the winch are controlled through the anti-explosion control box an