Land is the foundation of human existence, and it is also an important prerequisite and foundation for social construction and economic development. However, with the continuing construction and development of society and economy, a large number of trees have been felled, and the level of land desertification has been increasing. Therefore, it is very necessary to pay attention to strengthening land resource management. The application of "3S" technology in land resource management not only solves some problems in land resources, but also promotes the development of China's economy. The author conducted research and analysis on "3S" technology, and put forward an effective strategy for the application of "3S" technology in land resource management, hoping to help the smooth progress of land resource management activities.