The invention discloses a pollution harmless treatment device. The pollution harmless treatment device comprises a water tank, the upper portion of the water tank is provided with a first motor, the lower end of the rotating shaft of the first motor is provided with a vibrating bar, the left of the water tank is connected to the upper portion of an adsorption settling pond through a first output pipe, the upper portion of the adsorption settling pond is provided with a second motor, the middle of the left of the adsorption settling pond is provided with a filter system, the filter system comprises a third motor and a rectangular frame, the upper end and the lower end inside the rectangular frame are provided with teeth, the end of the rotating shaft of the third shaft penetrates through the side wall of the adsorption settling pond and is connected with a gear, which is engaged with the teeth at the upper end and the lower end, and the front portion of the left of the adsorption settling pond is connected with a reverse osmosis unit through a second output pipe. By means of the filter system, the pollution harmless treatment device can effectively remove large-grained impurities ina water source through a screen mesh; the filter system drives the gear through the motor, so that the rectangular frame can swing left and right to effectively screen the impurities off.