Freeze-thaw cycle and sulfate attack are two important factors that affect the durability of panel concrete. The paper studied the mass loss rate,the viriation law and feature of relative dynamic modulus of panel concrete with water to cement ratio of 0.45,0.42,0.38 under freeze-thaw cycles ,sulfate attack and the alternation test in solutions of 5.0% Na2SO4. The results show that the less the water cement ratio,the stonger the ability of face slab concrete of resistance to frost and sulfate erosion becomes.The effect of double factors of freeze-thaw cycle and sulfate attack is not a simple mutual superposition, but is a super superposition effect. The two kinds of damage is promoted and impacted each other.The result can provide a reference for the research of durability of panel concrete.