The present invention provides a retreat preventing apparatus, comprising: a base (1) for providing support, a detecting assembly provided on the base (1) for detecting the movement direction of a winch traction rope, and a braking assembly provided on the base (1) and connected to the detecting assembly; the detecting assembly triggers the braking assembly at the time of the movement of the winch traction rope in an opposite direction detected by the detecting assembly, so as to make the braking assembly clamp the winch traction rope. The apparatus of the present invention can automatically detect the movement direction of the winch traction rope and can timely clamp the winch traction rope when the traction rope moves in an opposite direction, thereby preventing retreat from generating and avoiding various accidents caused by retreat.
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