The invention relates to a winch lifting device with an automatic power off protection function, which is characterized in that a winch nest is arranged on one side wall of the front of a tunnel, a power supply control switch and a winch are arranged in the winch nest; a insurance gear is arranged at the rear of the tunnel, an automatic power off protection device is fixed on a joist steel on the top of the tunnel between the insurance gear and the winch nest and is composed two clamps arranged on the top and the bottom of the joist steel, heads of the two clamps are respectively clamped on one steel plate at the other side of the joist steel, a deviation sensor is arranged at the lower part of the steel plate, the lower part of the deviation sensor is connected with an oscillating rod through an oscillating power off switch, and the oscillating power off switch as a normally closed point is serially connected to a power supply control switch circuit of the winch through a control connecting line. During the use, when the winch is in an over-twisting state to touch the oscillating rod, a winch power supply is automatically switched off so that the winch stops operating, therefore, accidents are avoided. The winch lifting device with the automatic power off protection function of the invention can be widely applied to a transportation process of underground inclined roadways.