The static performances of foaming agent DLF, including foamability, stability, were tested and evaluated using the method of Waring Blender, and on this basis the dynamic plugging and profile control ability was studied through one-dimensional core flow experiments. The results showed that, the DLF system had great heat-resistant and aging-resistant performances, and the static foamability and dynamic plugging and profile control abilities of the whole system were best under 80℃, what’s more, the foam resistance factor of the DLF system was still about 18 when the temperature reached up to 180℃; at the same time, its static salt tolerance performance was also very good, and the DLF system was tolerant to Ca²⁺ and Mg²⁺ at certain concentration, correspondingly for the whole system，the sensitivity order from strong to weak was: Mg²⁺ (40 mg/L), Ca²⁺ (600 mg/L) and Na⁺ (28000 mg/L).