Abstract: A container deck of a trailer includes a front mounting floor, a central elevating floor, a rear mounting floor and a rear elevating floor, the central elevating floor is capable of loading and unloading the air container from the left or right side of the trailer vehicle body, the rear elevating floor is capable of loading and unloading the air container from any of the left and right sides and rear end, the front and rear mounting floors are provided with a roller conveyor for movably placing the container and a roller conveyor and a fixed side guide for slidably engaged the container, the central elevating floor is rotatable, the rear elevating floor includes a turntable and a ball conveyor, the central elevating floor and the rear elevating floor are capable to move up and down a single container.