The temperature characteristic of the acoustic deformation potential surface polaron in polar crystal, which has a weak coupling with surface phonons and a strong coupling with surface optical phonons was studied by using linear-combination-operator method.Numerical calculation for KI crystal as an example, illustrated that the vibration frequency λ and effective mass m^*₂ of the acoustic deformation potential surface polaron decrease with increasing temperature, but the induced potential V^a_i of the acoustic deformation potential surface polaron will increase with increasing temperature.