NOVELTY - A wastewater treatment device comprises oil separating pond (1), adjusting pond (2), biochemical treatment pond (3), precipitating pond (4), filtering pond (5), depth treatment pond (6), recycling water pond (7), sludge drying and composting pond (8), sump pump (9), fan (10), aerating device (11), back flushing device (12), temperature-controlled heating device (13), liquid level control device (14), and thermal insulating device (15).    USE - Device for integrated treatment for wastewater (claimed).    ADVANTAGE - The device has modularized structure, high treatment efficiency, strong automatic control capacity, and wide application range; requires little investment; and provides convenient transportation.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for using wastewater treatment device comprising introducing wastewater to oil separating pond (1) and then in the adjusting pond (2), introducing neutralized and adjusted wastewater into the biochemical treatment pond (3), providing biochemical treatment pond with the sump pump (9) and the aerating device (11),introducing wastewater into the precipitating pond (4) after the biochemical treatment, filtering the wastewater into filtering pond, setting the back flushing device or filtrate medium regenerating device beside the filtering pond, introducing the filtered water into the depth treatment pond (6) to obtain the standard recycling water, introducing recycling water into the recycling pond (7), providing the inner side of pond with the liquid level control device (14) for controlling the water level, lifting the remainder sludge from the precipitating pond (4) and placing the remainder sludge to the sludge drying and composting pond (8), carrying out middle-high temperature composting to the remainder sludge using temperature-controlled heating device (13), and wrapping the outer part of the device with the thermal insulating layer (15).    DESCRIPTION OF DRAWING(S) - The drawing shows a cross sectional view of the integrated treatment and comprehensive utilization device.    Oil separating pond (1)    Adjusting pond (2)    Biochemical treatment pond (3)    Precipitating pond (4)    Filtering pond (5)    Depth treatment pond (6)    Recycling water pond (7)    Sludge drying and composting pond (8)    Sump pump (9)    Fan (10)    Aerating device (11)    Back flushing device (12)    Temperature-controlled heating device (13)    Liquid level control device (14)    Thermal insulating device (15)