The invention provides an upper pulling and lower supporting rod piece supporting beam device for installation of a large movable arm tower crane C-shaped frame. A horizontal supporting beam is used for supporting the C-shaped frame with two beams combined into one. An oblique pulling rod embedded part and an oblique supporting rod embedded part are arranged in the vertical direction and are embedded in a first building structure and a second building structure correspondingly. The oblique pulling rod embedded part is located above the oblique supporting rod embedded part. The two ends of a vertical oblique pulling rod are connected with the oblique pulling rod embedded part and the horizontal supporting beam correspondingly and are used for pulling the horizontal supporting beam. The two ends of a vertical oblique supporting rod are connected with the oblique supporting rod embedded part and the horizontal supporting beam and are used for supporting the horizontal supporting beam. A splayed shape rotating clockwise by 90 degrees is formed by the vertical oblique pulling rod and the vertical oblique supporting rod, and the vertical oblique pulling rod is located above the vertical oblique supporting rod. According to the upper pulling and lower supporting rod piece supporting beam device for installation of the large movable arm tower crane C-shaped frame, definite force transmission can be ensured, welding deformation is reduced, the welding quality is ensured, design is ingenious, the structure is simple, the cost is low, and the device is suitable for large-scale application and popularization.