The viscosity of ASP system and the interfacial tension between ASP system and the crude oil can be changed when the ASP agent flows through the Secondary-Class oil layer. In this paper, five different length of artificial cores（10 cm，20 cm，30 cm，60 cm，80cm）were used to simulate the different ASP migration distances. The viscosity of the production fluid and the interfacial tension between the production fluid and the simulated oil were measured in order to analysis the effect of the change of ASP agent properties on recovery. The result showed that as the migration distance increasing, the ASP flooding recovery decreased gradually and the decreasing range of the recovery was larger nearby the injection end. The ASP flooding recovery was affected by the viscosity and the interfacial tension. When the migration distance was smaller than 30 cm, the displacement efficient and sweep efficient were relative higher because of the low interfacial tension and strong mobility control ability, leading to higher flooding recovery and ultimate recovery; however, when the migration distance was larger than 30 cm, the viscosity played the dominant role in the ASP flooding process and the effect of the interfacial tension was weak. The ASP flooding recovery increased with the increase of relative injection volume. Therefore, the increase of the relative injection volume of the ASP flooding adequately could enhance the recovery of Daqing Second-Class oil layer effectively.