Folding double-channel boom structure and fire-fighting vehicle thereof

The utility model relates to the technical field of fire rescue equipment, and provides a folding type double-channel arm support structure and a fire-fighting vehicle thereof, which comprise a main arm support, a driving part, at least one stage of folding arm support, a rotating mechanism and a step part, the step components are arranged on the two sides of the main arm frame and the two sides of the folding arm frame. The folding arm frame is connected with the main arm frame through a rotating mechanism, and the main arm frame is used for supporting the folding arm frame; the driving component is connected with the rotating mechanism to drive the rotating mechanism to rotate so as to drive the folding arm frame to be unfolded to form a channel or folded to form a folding structure. According to the utility model, the arm frame is arranged to be the main arm frame and the folding arm frame, so that the whole arm frame device is in a folding state when being stored, the space occupation of the arm frame str