The cloud vertical structure (CVS) acts an important aspect of cloud characteristics and atmospheric model. The vertical distribution statistics of clouds over China Sea and adjacent sea area were derived from the Cloud Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) level 2 version 3 lidar cloud layer data from 2007 to 2010. The results show that the cloud occurrence frequencies (COF) of single and multi-layer clouds over the mentioned area are different, and the layer-top-altitude (LTA) occurrence frequencies have obvious difference with latitude. High clouds (10~20 km) have high occurrence frequency near equator. Because there are some opacity clouds, the result of layer-number and LTA may be smaller than the real situation.