Physica MCR301 rheometer was used to measure interfacial shear viscoelasticity between different chemical flooding systems and crude oil in order to explore effects of components in combination system（alkali，surfactant，polymer）on oil-water interfacial shear viscoelasticity. The results show that rigid interfacial film can be formed between crude oil and deionized water with high interfacial shear viscoelasticity. Small amounts of surfactant（like mass concentration of 100 mg/L）will significantly reduce interfacial viscoelasticity of crude oil and water. Within the examined mass concentration of the surfactant，higher concentration of the surfactant brings lower interfacial shear viscoelasticity of the interfacial film. Under the condition of high mass concentration of the surfactant（like 3 000 mg/L）and high oscillation angular frequency（like 1 rad/s），interfacial storage modulus exceeds the lower limit of the instrument. Alkali may cause serious damage to the interfacial film. Interfacial loss modulus of lye-oil system are far less than that of water-oil system and interfacial storage modulus of the lye-oil system is too small to be tested，but the damage of organic base on the interfacial film is smaller than that of inorganic base. Polymer will increase the oil-water interfacial viscoelasticity，but the interfacial film can be destroyed easily.