In this paper, application of well ground combined logging technology in monitoring groundwater environmental data has been studied, so as to achieve effective protection and sustainable utilization of groundwater resources. Through measuring representative groundwater monitoring wells, combining with geological background data and data analysis, groundwater environment has been comprehensively and systematically monitored. After field application, well and ground combined logging technology can accurately obtain various parameters of groundwater environment, such as water flow, water quality and flow direction. It is indicaed that the technology can monitor dynamic changes of groundwater in real time, provide scientific basis for groundwater resource management and protection. It has the advantages of simple operation, high measurement accuracy and low cost. It is suitable for promotion and application in a wide range of areas. It can be seen that well ground combined logging technology has significant application value in monitoring groundwater environmental data.