Corner reflectors on satellites are inevitably subjected to the influence of atmospheric turbulences in space explorations and tracking targets. Turbulence effects produce significant intensity fluctuations, seriously affecting the quality of the detected signal. In order to study the influences of atmospheric turbulent inner and outer scales on the scintillation index, researches about the corner reflector echo scintillation index from the transmitter to the reflector and from the reflector to the transmitter are carried on based on the ITU-R atmospheric structure constant model which is dependent on the altitude, while considering the influences of inner and outer scales. Numerical calculation results indicate that in the weak turbulence zone, inner scale turbulence scintillation indexes of the echo effects are greater than the outer scale; in the strong turbulence zone, with the outer scale increases, the echo scintillation index also increases, and it is larger than the inner scale.