Width-adjustable cable trench cover plate dismounting mechanism

The utility model discloses a width-adjustable cable trench cover plate dismounting mechanism, which comprises a main base and an L-shaped second base plate arranged on the main base, and a longitudinal adjusting mechanism for adjusting the relative distance between the second base plate and the main base is connected between the second base plate and the main base; a first air cylinder which is vertically arranged is arranged on the second base plate, and the first air cylinder is in driving connection with an upper pressing plate; one end of the upper pressing plate is connected with a fourth base plate, the fourth base plate is perpendicularly connected to the upper pressing plate, a second air cylinder is arranged on the fourth base plate, and the driving direction of the second air cylinder is perpendicular to the driving direction of the first air cylinder. The second air cylinder is in driving connection with a lower pressing plate at the position of the upper pressing plate, and the upper pressing pla