Sliding block structure, telescopic arm and operation machine

The utility model relates to the technical field of telescopic arms, and provides a sliding block structure, a telescopic arm and an operation machine, the sliding block structure comprises a sliding block, a first wedge block, a second wedge block and a base in sequence from top to bottom; the sliding block is connected with the first wedge-shaped block; the inclined surface of the first wedge-shaped block is in contact with the inclined surface of the second wedge-shaped block; the base is used for being arranged on an arm frame of a telescopic arm, and a first position adjusting piece and a second position adjusting piece are inserted into a first vertical plate and a second vertical plate on the base respectively. The first position adjusting piece abuts against the first wedge-shaped block, and the second position adjusting piece abuts against the second wedge-shaped block. During use, the first wedge-shaped block can move towards the side face of the arm frame by rotating the first position adjusting pi