Anti-extrusion device and aerial work machine

The anti-extrusion device comprises a movable mechanism, fixed mechanisms and a position signal detection mechanism, the movable mechanism comprises a collision rod, the two ends of the collision rod are movably connected with the fixed mechanisms respectively and can move along the track of a sliding rail, and the sliding rail comprises a first rail and a second rail. A reset mechanism is arranged between the end of the collision rod and the first rail, so that the collision rod responds to extrusion thrust borne by an operator to move from the initial state to the direction away from the operator, after the extrusion thrust disappears, the collision rod automatically recovers to the initial state along with the reset mechanism, and the second rail is connected with the first rail through the middle rail. When the collision rod triggers the limit position, the movement direction is changed and the collision rod falls into the second track; and the position signal detection mechanism is mounted to be capable