Wall panel structure of refrigerated container

The utility model relates to a wall panel structure of a refrigerated container, which comprises an outer wall panel, an FRP (fiber reinforced polyester) inner wall panel, strengthening ribs, as well as a foaming layer filling between the outer wall panel and the FRP inner wall panel, wherein at least one welding stud planted through ultrasonic wave welding is arranged on the FRP inner wall panel, and the strengthening rib is fixed on the FRP inner wall panel by the welding stud. The utility model effectively solves the problem of insecure bonding between the original FRP inner wall panel and the strengthening rib, improves the bonding strength of the FRP inner wall panel and the strengthening rib, enables the FRP inner wall panel and the foaming layer to be closely bonded, prevents the FRP inner wall panel from being separated from a thermal insulation layer, improves the thermal insulation performance of a container body, and meanwhile reduces the manufacturing cost.