In order to take control of the space, the advanced countries have already developed extensively anti-satellite laser weapon, and have the anti-satellite ability of first step. Ground-based anti-satellite laser weapon can perform soft and hard damage to target such as satellite in orbit. Its technology is the most mature and has become an important part of future outer space attack and defense combat weapon system. It is highly valued by all countries in the world. Considering the purpose of ground-based anti-satellite, the introduction and analysis of public reported American ground-based laser system were emphasized. The system concept, operational concept, key component, test mode and shooting mode were shown, and the key function parameters relevant to the system were also analyzed, which provided a reference for studying the United States possible anti-satellite laser weapon and satellite target defense from laser striking.