Machining lathe with clamping mechanism

The utility model discloses a machining lathe with a clamping mechanism, which belongs to the technical field of machining and comprises a machining lathe main body, two supporting seats are fixed on the upper surface of the machining lathe main body, a sliding trolley is mounted between the two supporting seats in a sliding manner, an air cylinder is fixed on the side surface of one supporting seat, and a clamping mechanism is fixed on the side surface of the other supporting seat. A piston rod of the air cylinder is fixedly connected with one side face of the sliding trolley. The air cylinder is arranged to be matched with the sliding trolley for use, the position of the sliding trolley can be pushed, the distance between the sliding trolley and the three-jaw chuck can be adjusted, the requirement for clamping workpieces of different lengths is met, the clamping adjusting mechanism is matched with the supporting arms for use, and the two sets of supporting arms can be driven to move relatively through the c