The change of water level of karst water in Jiaozuo mining area is a very important problem in Jiaozuo City construction under the influence of bi-directional factors of the closure of coal mine and the reduction of urban karst water exploitation. In this paper, the correlation degree of water level with rainfall and exploitation was studied by slope grey relational analysis method. The moving average method and the Mann-Kendall nonparametric statistic method were used to analyze the change trend of karst water level, rainfall and exploitation since 1965. Based on the analysis of the main influencing factors of karst water level, the multivariate correlation analysis method was used to establish model to simulate and forecast karst water level. The results show that the precipitation in Jiaozuo mining area has not decreased obviously since 1965. The decline of karst water level is not due to the decrease of rainfall infiltration recharge, but mainly related to the growing urban exploitation and mine displacement. When the total amount of exploitation is reduced to 4.1 m3/s, the highest water level will be 95 m higher than the Jiuli Mountain Spring mark elevation, and the Jiuli Mountain spring groups in the history would be poured back. The results of the study can provide the basis for the construction of landscape garden in Jiuli Mountain area in Jiaozuo.