The invention provides a rapid leaching complete device for contaminated soil remediation. An outlet of a feeding hopper is formed in the initial end of a weighing belt conveyor. The tail end of the weighing belt conveyor is arranged at the initial end of a large-dip-angle belt conveyor. The tail end of the large-dip-angle belt conveyor is arranged at one end of a roller leaching mud making machine. The other end of the roller leaching mud making machine is arranged at the initial end of a three-level leaching screening vibrating screen. An upper-layer outlet of the three-level leaching screening vibrating screen is formed in one end of the belt conveyor. A middle-layer outlet of the three-level leaching screening vibrating screen is formed in the upper portion of a spiral sand washer. A lower-layer outlet of the three-level leaching screening vibrating screen is formed in the upper portion of a first mud pit. A leaching liquid waste stabilizing integrated treatment device is connected with a plate-frame filter press through a pump. A sewage pit is connected with the plate-frame filter press. Sewage of the sewage pit is lifted by the pump to a sewage treatment station. The sewage treatment station comprises an inclined plate settling pit, a silica sand filter tank and an activated carbon filter tank. Water treated by the sewage treatment station is lifted by the pump to a recycling water tank to be recycled.