Abstract: Polymer flooding technology has been developing rapidly in China,and how to further enhance recovery fac-tor after polymer flooding has become the focus of research at present.Several measures such as microbial flooding,al-kali-surfactant-polymer flooding and micro gel flooding are presented to further enhance recovery factor according to the c haracteristics of residual oil distribution being highly scattered after polymer flooding and in combination with the laboratory experiment and field pilot res ults.Another3%recovery factor are expected with additional recoverable reserv es of1,390,000t.