Among a number of compliance functions of concrete creep, power exponential function has been selected to be as model code by the State Electric Company and Water Resource Minister of China recently. Because of that power exponential function involves so many parameters and ignores the non reverse creep of concrete, the precision is quite limited in mathematical calculation, especial in simulating the constructing processes of mass concrete. This paper analyzed the characters of Bazant's solidification theory for concrete creep and its condition in application, and certifies its rationality when it is used in RCC concrete with actual testing information.