In recent years,the problem of maritime in South China Sea region has become increasingly severe,which greatly affects the regional harmony. As two important actors in South China Sea region, China and ASEAN should be domi-nant force to build a harmonious maritime order in the region. China and ASEAN’s trade and economic are integrated, con- cept are similar, desire to provide public goods are strong, and multi-level security dialogue mechanisms have built, which lead to building a harmonious maritime order in the South China Sea become realis...