Now the GNSS has been widely used in various fields of the national economy and national defense. In the civil and military action, the dependence on satellite navigation system constantly enhances. The competition in satellite navigation is also increasingly fierce. The satellite communication is vulnerable to jamming, so it is necessary to study some effective and feasible methods of anti-jamming to avoid interference. This paper conducts a series of researches on communication anti-jamming technology and algorithm of GNSS, summaries the current situation and development trend of anti-jamming technology.