Arm frame assembly of lagging jack trolley and lagging jack trolley

The invention discloses an arm support assembly of an arch frame trolley and the arch frame trolley. The arm frame assembly of the lagging jack trolley is arranged on a trolley body of the lagging jack trolley, and comprises a first arm frame, a second arm frame, a third arm frame and a fourth arm frame, the first arm frame is arranged at the front end of the trolley body through a first rotary table seat, and the first arm frame can horizontally rotate and pitch up and down on the first rotary table seat; the second arm frame is arranged at the rear end of the vehicle body through a second rotary table seat, and the second arm frame can horizontally rotate and pitch up and down on the first rotary table seat; and at least one of the first rotary table seat and the second rotary table seat can move left and right relative to the vehicle body, so that at least one of the first arm frame and the second arm frame can move left and right relative to the vehicle body. Through left-right movement of the arm frame,