Bohai oilfield had achieved some results of increasing oil production and decreasing water cut after polymer flooding enhanced oil recovery technique was implemented since 2003. But the increasing scale of polymer flooding brought many challenges to the treatment of crude oil and water on platform. The problems on oil- water separation of polymer- containing produced fluid，treatment of polymer-containing wastewater，treatment of oily sludge and wastewater reinjection were analyzed，on the basis of the status of produced fluid treatment in offshore polymer flooding oilfield. Studies on the treatment of polymer-flooding produced fluid in rencent years had significant instruction for the development of demulsifiers，water clarifiers and plug removal agent in offshore polymer flooding oilfield. The recommendations concerning further improving the processing capacity of polymer flooding produced fluid，enhancing the treatment effect of crude oil and wastewater，reducing the amount of oily sludge and increasing the efficiency of removing plug of oil or water well in offshore oilfield were provided.