The invention discloses an integrated domestic wastewater treatment device. The integrated domestic wastewater treatment device comprises a hydrolysis acidification tank, a contact oxidation tank, a secondary sedimentation tank, a biological filtration tank and a quartz sand filtration tank which are connected in sequence, wherein an intermediate water tank is arranged between the biological filtration tank and the quartz sand filtration tank, and the three tanks are closely adjacent to each other in sequence; the filtering materials in the filtration areas of both the biological filtration tank and the quartz sand filtration tank are located below the filtration tanks, and a reversely cleaning device is arranged above the filtration areas. According to the invention, the tank-type biological filtration tank and the tank-type filter are integrated in previous treatment equipment so as to form integrated treatment equipment, as a result, a water flow naturally flows through each functional area from top to bottom, extra lifting pump is needless, valves and connecting pipelines are not required to be arranged in the biologic filtration tank and the filtration area, the consistency and integrity of the equipment are fully ensured, the filed mounting can be quickly performed, besides, embedding is convenient to perform, the occupied area is decreased, the control manner is simplified, the working energy consumption and noise pollution are lowered, and the formation of modularized and mass standard product is facilitated.