Abstract: In order to get the interwell parameter of the well which have not get tracer breaking, a similarity calculation method of fingerprint between the breaking well and the unbreaking was carried out by combinating the tracer interpretation technology with the polymer flooding water cut curve. The results showed that the number of predominance flow channel equaled to the number of peaks of the polymer flooding water cut curve. The starting response time showed that the interwell permeability and response time showed the swept volume of polymer solution. Based on the analysis of the water cut curve and the tracer testing interpretation, the interwell predominance flow channel can be predicated. The cost of tracer testing is saved and the tracer testing interpretation is expanded for this method. In addition， some suggestions were provided for the development of oil field.