Telescopic arm crawler belt stacker crane

The utility model discloses a telescopic arm crawler belt stacker crane, and relates to cabin unloading equipment operating in a cabin. The utility model aims to solve the problems that the existing crawler crane occupies a large working space and has single working function, so that the working condition is limited, and the working limitation exists. The lifting device comprises a crawler chassis, a rotary table, a basic arm, a second-section arm, a third-section arm, a lifting lever frame and a lifting lever, the lower end of the rotary table is rotationally connected with the upper end of the crawler chassis, two large arm oil cylinders are rotationally connected between the basic arm and the rotary table, a small arm oil cylinder is hinged between the basic arm and the second-section arm, the rear end of the third-section arm is inserted into the inner side of the front end of the second-section arm, and the lifting lever frame is connected with the lifting lever. The third-section arm is slidably connect