The thesis mainly carries out a detailed research on the updating mechanism and mode of Italian communities renewal, selects several typical cities represented by Turin as the research object, and systematically sorts out and summarizes their renewal characteristics and experiences. This paper firstly sorts out the different development stages of community renewal in Italy from the perspective of policy and mechanism, and extracts the renewal characteristics of each stage and the new trend in the future. Then, combined with the typical renovation cases of Turin and other cities, the measures and specific contents of community renewal are discussed in detail from four aspects of improving the quality of existing space, activating neighborhood space, improving public facilities and regenerating abandoned buildings.