Anti-collision trimming device

The utility model relates to an anti-collision trimming device which comprises an installation frame (1), an installation plate (2) is connected into the installation frame (1), and two trimming mechanisms (101) which are arranged in a central symmetry mode are arranged on the installation plate (2). The trimming mechanism (101) comprises a sliding rail (3) arranged on the mounting plate (2) and atrimming plate (5) connected to the sliding rail (3) in a sliding mode through a sliding block, an air cylinder (4) parallel to the sliding rail (3) is further arranged on the mounting plate (2), andthe driving end of the air cylinder (4) is connected with the sliding block. A first guide-in piece (6) and a second guide-in piece (7) are arranged at the left end and the right end, facing the outer side of the mounting frame (1), of the trimming plate (5), and an upper trimming knife mechanism and a lower trimming knife mechanism are arranged at the positions, between the first guide-in piece(6) and the second guide-in