The essential features of mesoscale convective complex in Northeast China(NMCC) and it's developing process were induced by analysing the satellite cloud pictures of ten years.Because of the effect of geographical conditions,NMCC is different from MCC in the Great Plain of the United States,northwest of China and North China.As a special convective weather system,there is marked difference between the feature of NMCC and that of the general mesoscale convective cloud clusters.