Abstract: Aiming at the combined foam stabilizer foam system which has been researched，the stability and apparent viscosity of the system，which is caused by high salinity，is researched at 80℃，and foam microstructure，which is nonsalt，7.08×104mg/L and salinity of 20.3×104mg/L respectively，is observed with SEM，as to obtain the mechanism of synergistic action.The viscoelastic behavior of foam system is studied with HAAKE rheologic apparatus.The results of experiment indicate in this foam system，there is the characteristic of high salinity increasing stability and apparent viscosity and the best antisaline concentration.The result of SEM indicates among high concentration salinity，polymer and surfactant formed histrength complex film is formed，which can increase the stability of the foam system greatly，and the foam system is of superior viscoelasticity.The synergistic action caused by high salinity is firstly researched in this paper，which enhances foam theory and is valuable.

Key words: Combination formunation, foam, high salinity, synergistic action, viscoelasticity