[Objective] The temporal and spatial changes of ecological carrying capacity and its influence factors in Daqing City of Heilongjiang Province were analyzed comprehensively in order to provide a scientific basis for the ecological environment management of Daqing City and similar resource cities.[Methods] The ecological footprint model was used to analyze the temporal and spatial changes of ecological carrying capacity in Daqing City and other administrative regions in nearly 30 a. The PLS model was applied to screen the influencing factors of ecological carrying capacity in Daqing City quantitatively.[Results] In the past 1986-2016 years, the ecological status of the study area showed an ecological deficit. Except for the urban area, the level of ecological deficit in all regions presented an upward trend. Although the influences of externality of energy consumption were eliminated, the area of low ecological security grade in Daqing City still showed expanding trend; the ecological coordination coefficient of each region has declined to varying degrees. Except for Lindian County and Dulbert, other regions were in a state of poor coordination. During the study period, five factors, including the amount of investment in agricultural fixed assets, the growth rate of GDP, the proportion of the total industry, the total retail sales of social consumer goods and the total output value of agriculture, had significant impacts on the ecological carrying capacity of Daqing City.[Conclusion] At present, the ecological carrying capacity of Daqing City is characterized by high pressure, uneven spatial distribution and diverse factors. When making measures to increase ecological carrying capacity, we must pay attention to local conditions and conform to reality.