Abstract: Dewatering effect of atmospheric temperature con-densed liquid separator is poor and water content in crude sta ble condensed liquid hydrocarbon is high in the light hydrocarbon recovery unit of the No.1gathering sta tion in Baolang oilfield.Technological modification were carried out to realize cooling and dewatering of at-mo spheric tempera ture condensed liquid and crude sta ble condensed liquid hydrocarbon.Frozen blocking in the fractionating system of the light hydrocarbon recovery unit was prevented and the problem that the products cotaining water was solved .Out put and prod uct qual i ty of light hy dro car bon re cov ery unit were im proved.