Abstract: By statistical analyzing to mesoscale convective systems(MCS) in lower latitude plateau of China with sate-llite cloud picture black-body temperature(TBB), the spatial and temporal distribution of meso-β scale convect ive syst ems(MβCS) and meso-α scale convect ive systems(MαCS) and mesoscale convective complex (MCC) have been studied. The results showed that the MCS occurred in two favorable areas. One of them wast hearea between Yunnan and Guizhou in the eastern lower latitude plateau and the other one was the area between China and Vietnam. It also has been found that the occurrence of MCS was relat ed to the elevation. There were more MCSs in the interim areas such as Yunnan-Guizhou, Yunnan-Vietnam, Sichuan-Yunnan and Jinsha River valley, and fewer in those areas which elevation was higher than it's around. It was related to the actions of cold at mosphere, lower unstable energy and mountain-plain circulations. The MCSs mainly occurred in June, July and August (occupied 67.1% of all the MCSs), and there were most MCSs and MCCs in June. These caused the seasonal variation (the onset of East Asian M onsoon and Sout h Asian Monsoon) and heat convection with heating underlying surface. There was a subpeak of generation in 0-7 BST besides a main peak of generation in 18-23 BST. It is different f rom the other areas in our country, may be caused by the special topography and the geographical position. The moving routes also have been studied in this paper. Most MCSs moved from the west or the north west to the east or the sout heast. Some MCSs moved along the sout hern airf low of the subtropical high. About 1/4 MCSs were quasistationary.