Abstract: In city space during planning process, development suitability division evaluation, which ascertained the degree of development suitability and spatial distribution in a city, provided a scientific basis for land development and spatial division in city planning, in order to coordinate development and construction with the protection of ecological environment. With the theories of city and regional space development and control at home and abroad for reference, based on analysis of spatial development suitability, taking high resolution aerial images, statistical yearbook, field investigation as data source, evaluation index system was established on the two levels of ecological constraints, development demands and supporting capability, including 9 elements and 20 factors. With combination weighting approach to confirm the weight of each factor, grid as assessment unit, a set of city spatial control division system was constructed through GIS spatial analysis technology, in order to ensure city or industrial development suitability of each evaluation unit, and further to delimit all kinds of control zones. Taking Tongling as an empirical research, according to a comprehensive analysis of its natural ecological constraints, economic demands and supporting ability, measures of division control were formulated which divides the city space of Tongling into construction-suitable zone, comparatively construction-suitable zone, construction-constrained zone and construction-prohibited zone. The suggestions of space utilization were put forward, so as to offer a balanced spatial pattern to coordinate economic development and population, resources and environment and a guideline for space use planning in Tongling.