Abstract: Against the backdrop of intensifying climate change and increasing complexity of disaster events, this paper addresses the insufficient emergency carrying capacity and spatial resource misallocation in megacities and large cities. It proposes a planning method of 'near-suburban town emergency function adaptation under the constraint of main functional zoning', emphasizing the ecological security bottom line and integrating core elements such as transportation coordination, resilience support, and land potential to construct a 'dual-use' facility adaptation system for near-suburban towns. It clarifies their dual roles as an extension of emergency support for the central urban area and supporting disaster prevention services within the town. Through an empirical study of near-suburban towns in Kunming, it puts forward the layout principles of 'regionalized services, integrated disaster prevention, and multi-functional use', and integrates them into a three-level resilient urban-rural disaster prevention network, providing theoretical support and practical models for the coordinated development of urban and rural safety and development in megacities and large cities.