The utility model discloses a reverse osmosis sewage treatment system, including the consecutive equalizing basin that connects, highly dense pond, V type filtering pond, middle pond, multi -media filter, multi -media filter is connected with ultrafiltration device, weak acid bed respectively, in the middle of the ultrafiltration device, sewage pond, precision filter is consecutive connects, be equipped with the high -pressure pump between precision filter and the sewage reverse osmosis unit, the weak acid bed is connected in the pond with dense aquatic within a definite time, pond, safety filter ware, consecutive the connecing of dense water reverse osmosis unit between dense aquatic, dense water reverse osmosis unit is connected with dense pond. Increase ultrafiltration in processing system, solved reverse osmosis's the stifled problem low with the rate of recovery of dirt, having increased weak acid bed process, having solved dense water reverse osmosis's scale deposit problem, through reverse osmosis sewage treatment system, wastewater recovery is rateed and is obviously improved, carries out the problem of arranging outside sewage has been solved to the sediment with remaining dense water, realizes zero discharging of sewage, and both the water economy resource was protected the environment again.