This paper took Yichun City,Heilongjiang Province,as a typical case to systematically analyze the current situation and transformation logic of the city in the dimensions of ecological environment,urban space,and industrial structure under the guidance of the Park City Theory,construct a comprehensive transformation and development framework integrating ecological restoration,spatial optimization,and industrial upgrading,and propose specific implementation paths and countermeasures.In the ecological dimension,it is necessary to establish a systematic restoration mechanism,strengthen forest monitoring and natural forest protection,encourage the development of green industries such as ecotourism and forest-based economy,incorporate ecological value accounting into the assessment system,simultaneously develop the forestry carbon sink economy,and reduce dependence on high-energy-consumption industries.In the spatial dimension,it is necessary to promote intensive restructuring,optimize the urban spatial structure through a transit-oriented development model,enhance the service functions of the central urban area,designate ecological protection zones to restore degraded forest land,and strengthen the ecological service capacity of the green space network.In the industrial dimension,it is necessary to cultivate the under-forest economy industrial chain,develop green industrial tourism products such as ice and snow equipment,advance research and study programs on deep processing of timber,and build an integrated"tourism+health and wellness+culture"industry by leveraging forest resources.This article provides a reference for similar forestry resource-based cities to explore sustainable development paths.