In order to analyze the spatial structure of Cunninghamia lanceolata-broadleaved mixed plantation on a Jiuhua Mountain farm, three different composition of Cunninghamia lanceolata-Broadleaved Mixed Plantation was taken as the study object, three spatial structure parameters, the angle index, mingling degree, and neighborhood comparison, were calculated. The results showed that the dominant species were C. lanceolata, Quercus L., and Betula luminifera; additionally, a small amount of Pinus massoniana was scattered throughout the forest. Different tree species compositions presented different spatial structures:composition I had an average angle index of 0.42, average neighborhood comparison value of 0.31, and average mingling degree value of 0.18; composition Ⅱ had an average angle index of 0.5, average neighborhood comparison value of 0.32, and average mingling degree value of 0.48; and composition Ⅲ had an average angle index of 0.58, average neighborhood comparison value of 0.51, and an average mingling degree value of 0.54. This comprehensive analysis of the spatial structure of the forest on Jiuhua Mountain farm reflects the unreasonable circumstances in the spatial structure of the forest, provides a scientific basis for guiding reasonable selective cutting and near-natural management, and enables the multiple functions of the Cunninghamia lanceolata-broadleaved mixed plantation in this region to be sustainable.