A method to calculate the aberration of the reflected beam of corner cube retroreflector(CCR) is introduced. The light beam which passes through a faulty CCR will be induced an additional optical path difference, thus the characteristic of the phase of the reflecting beam and the direction of the beam propagation are changed. Using ray trace method, an effective mathematical model is built to calculate the additional aberration caused by dihedral angle errors and curved reflecting surfaces, and the error of the model is also analyzed. On conditions that the dihedral angle errors is 1″ and f-number of the reflecting surfaces is less than 0.5, the numerical simulation of the model shows that the additional aberration has a great centrosymmetry and the mean slop coefficient of the additional phase versus the phase introdured by the incident beam is zero, this characteristic is independent of the type and magnitude of fabrication errors. The aberration model of CCR offers a new way to analyze the system error caused by CCR. In addition, it would provide helps in manufacture of CCR for specific purpose.