Cambodia suffered from the war and political chaos in last four decades.It resulted not only in the collapse of regimes and disorder in Indo-Chinese peninsular. This thesis focuses on the ethnic Chinese policy of the Cambodia since the independent of Cambodia . It covers the aspects of politics, economic, and social affairs. Since Cambodia depart governance by France on 1953, the politics of Cambodia’s alter can be split into 5 different times which are Norodom Sihanouk, Lon Nol, Pol Pot, Heng Samrin, and Hun Sen. Because Most Chinese in Southeast Asia have superior ability of business, so the Cambodia Chinese who have superior ability of business is frequently to be resentful by Cambodian.In order to assimilate the ethnic Chinese into local society, the rulers of Cambodia take some restricted policy towards ethnic Chinese in the nationality, occupations, Chinese learning and political activities.It affect the economic and social position progressively worse. Since The UN supervised on 1991, Cambodia had signed the convention of peace. The social order and economic have been improved. After Hun Sen have taken to position of the prime minister, he started to urge multi-dimensional tribal group culture, Chinese education development, and business ability for helping Cambodian Chinese integrate to Cambodia culture. For this relate of policy, it has become a watershed of Cambodian Chinese policy. This subject is deserved to discusses and research.