Taking Hongan Historic Town as an example of increasingly decadent old trade town, the present paper mainly studies how to protect the historic cultural space, to develop the cultural industry to activating the town.By analyzing the regional cultural, historic building and space identities of mountains and rivers, combining with the key issues of cultural and natural ecosystems degradation, obsolete municipal infrastructure, the authors put forwards six planning strategies for protecting historic building, maintains harmonious texture, optimizing the skyline, constructing town nodes, consoli dating the traditional cultural origins, developing tourism industry to prosper the town.To sum up, the paper tries to provide some reference for the protection of similar historic towns.