Cable tray supporting frame

The utility model provides a cable tray supporting frame which comprises a pair of supporting plates arranged on a bottom plate in a spaced mode, a pair of supporting blocks are arranged between the pair of supporting plates, notches are formed in the inward ends of the supporting blocks and penetrate through one sides of the supporting blocks, and arc-shaped grooves are formed in the bottoms of the notches; the pair of guide plates are arranged between the pair of supporting plates, arc-shaped guide grooves are formed in the guide plates, one ends of the arc-shaped guide grooves are communicated with the notches, and the other ends of the arc-shaped guide grooves extend towards the bottoms of the guide plates; the U-shaped rod comprises a cross rod and vertical rods arranged at the two ends of the cross rod, the bottom of each vertical rod is connected with a connecting ring, an insertion rod is arranged in each connecting ring in a penetrating mode, and the outward end of each insertion rod is arranged in t