After a long struggle against colonial rule，Canada’s aboriginals were granted autonomy and empowering self-government by the federal government. Though the political，economic，educational，cultural and social welfare and other benefits of Canada’s aboriginal ethnic group was much improved after the second world war. But there is still a gulf between it and mainstream Canadian society and many acute social problems are mounting. So the Canada government has renewed social policy and improved social support system towards aboriginal ethnic group. There has been a shift in the core value of policy from self-government through empowerment to capacity building for sustainable development. The Canadian government is reconceptualizing its aboriginal social support system in three fundamental ways：individual，community，society，and integrating services in response to the needs of aboriginal ethnic groups.