Folding cart frame and pet cart provided with cart frame

A folding cart frame, having a folded state and an unfolded state, comprising a cart frame body and a wheel body assembly configured to drive the cart frame body to move, wherein the cart frame body comprises:

• a bottom frame structure, comprising at least two bottom frame members arranged along a length direction of the bottom frame structure in sequence, wherein two adjacent bottom frame members are rotatably connected, and the two adjacent bottom frame members are folded or unfolded through mutual rotation;
• a first side frame structure and a second side frame structure that are respectively arranged on two sides of the bottom frame structure along the length direction of the bottom frame structure, wherein the first side frame structure and the second side frame structure respectively comprise at least one group of two crossed rod members that are arranged in a mutually crossed manner and that are rotatably connected, and the two crossed rod members are folded or unfolded through mutual rotation;
• and
• a third side frame structure and a fourth side frame structure that are respectively arranged on the two sides of the bottom frame structure along a width direction of the bottom frame structure, wherein the third side frame structure comprises a third side frame member connected between one end of the first side frame structure and one end of the second side frame structure and a first canopy frame member rotatably connected to an upper portion of the third side frame member, the first canopy frame member is folded by flipping outward relative to the third side frame member, the fourth side frame structure comprises a fourth side frame member connected between the other end of the first side frame structure and the other end of the second side frame structure and a second canopy frame member rotatably connected to an upper portion of the fourth side frame member, the second canopy frame member is folded by flipping outward relative to the fourth side frame member, the first canopy frame member and the second canopy frame member form a support structure configured to mount and support a canopy in an unfolded state, and the first canopy frame member, the second canopy frame member, and the bottom frame member are arranged in a stacking manner in a folded state.