The adiabatic temperature rise of concrete containing different dosage of fly ash was investigated.The results denote that for higher m_W/m_B and low strength concrete,the adiabatic temperature rise of concrete decreases with the increasing dosage of fly ash;for lower m_W/m_B and high strength concrete,the adiabatic temperature rise of concrete increases when the dosage of fly ash increases till 50% and then decreases.With the same strength grade C30,the adiabatic temperature rise decreases when the dosage of fly ash increases.