Gas channeling during CO2 flooding often reduces sweep efficiency and oil recovery. Foam injection has proven effective in controlling CO2 breakthrough. This study develops a wormlike micellar foam system using anionic surfactant AOS, zwitterionic surfactant EAB, and foam stabilizer alkylamine TA, systematically investigating its viscoelastic behavior. Experimental results show that when the total surfactant concentration reaches 0.5% with an AOS-EAB blend ratio of 1:1 and TA concentration of 0.1%, the foam system achieves a comprehensive index of 107,208 mL.min. While foam performance decreases with rising temperature, the system maintains good stability below 70°C. Viscoelastic analysis reveals that at 0.5% total surfactant concentration, AOS and EAB molecules intertwine to form abundant wormlike micelles, significantly enhancing the system"s bulk viscosity and viscoelasticity. The highly viscoelastic wormlike micellar structure effectively retards liquid film drainage and strengthens foam film stability, thereby improving overall foam performance.