The invention discloses a method for achieving all-weather communication by means of two inclined geosynchronous satellite orbit (IGSO) communication satellites. The method for achieving all-weather communication by means of the two IGSO communication satellites comprises the steps that the two IGSO communication satellites are placed at co-location positions of one or two geostationary earth orbit (GEO) communication satellites, and the ascensional difference of an ascending node between the two IGSO communication satellites meets the requirement that the two IGSO communications satellite can not be located within the range three degrees above or below the equatorial plane at the same time; when the IGSO communication satellites are located beyond the range three degrees above or below the equatorial plane, a satellite communication ground station conducts the communication application through transparent repeaters or processing repeaters on the IGSO communication satellites; when one IGSO communication satellite is located within the range three degrees above or below the equatorial plane, the satellite communication ground station switches the communication service from the IGSO communication satellite located within the range three degrees above or below the equatorial plane to the other IGSO communication satellite, the communication application is conducted through the transparent repeater or processing repeater on the other IGSO communication satellite, and thus all-weather satellite communication is achieved by the satellite communication ground station through the two IGSO communication satellites.