The relations between CloudtoGround (CG) lighting activity and radarecho products, including CR (Composite Reflectivity), VIL (Vertical Integrated Liquid water), ET (Echo Top), are analyzed quantitatively and qualitatively through tracing the generation, developemnt and mitigation of a MCS (Mesoscale Convective System) thunderstorm process, after the “coarsening” grid processing of CG and Doppler data. The results show: 96.7% of CG appeared within the range of 40 to 55 dBz, and the center of maximum CG density always coincided with the center of intense echoes, but CGs seldom appeared above 65 dBz. often concentrated around the area with VIL greater than 40 kg·m-2, and the center of maximum CGdensity frequently located around the margin of the center of VIL. The number of CGs was correlated with the area of ET greater or equal to 11 km, which indicates that the area with cloud top up to a relatively high level in MCS influences greatly the intensity of CG lightning activity.