Frame folding structure of folding cart

The utility model discloses a frame folding structure of a folding cart, which is characterized in that a support component used for supporting a top frame is arranged on a bottom frame, the support component comprises a support frame, two connecting rods I, two connecting rods II and two connecting blocks, two ends of the support frame are respectively coupled with the two connecting blocks, the middle part of the support frame is detachably connected with the top frame, and the top frame is connected with the bottom frame. The first ends of the two first connecting rods are fixedly connected with the two connecting blocks respectively, the second ends of the first connecting rods are rotatably connected to the bottom frame, the first ends of the two second connecting rods are coupled with the two connecting blocks respectively, and the second ends of the second connecting rods are rotatably connected to the sliding seat; the folding frame has the advantages that when the frame is unfolded, the supporting as