Deviation correcting device capable of automatically sensing stress direction and size of cutter

The invention discloses a deviation correcting device capable of automatically sensing the stress direction and size of a cutter. The deviation correcting device comprises a blade, a steering belt wheel connected to the upper portion of the blade, a sensing frame fixed to the lower portion of the blade and a control chip, wherein strain gauges are symmetrically attached to two wings of the sensing frame and used for converting mechanical deformation information of the blade into corresponding electric signals during cutting of the blade; and the control chip is used for controlling the steering belt wheel to adjust the rotating direction and rotating angle of the blade in real time according to the electric signals of the strain gauges. By means of the deviation correcting device, the stress condition of the blade during cutting can be detected at any time, the posture of the blade is adjusted at any time according to the stress condition, and the cutting precision is improved. 本申请公开了一种自动感应刀具受力方向和大小的纠偏装置，包括：刀