The invention relates to a dual-frequency duplex full-simultaneous single-pulse self-tracking satellite communication feed source. The dual-frequency duplex full-simultaneous single-pulse self-tracking satellite communication feed source simultaneously has the functions of Ku-band uplink transmission, Ku-band downlink single-pulse self-tracking, Ka-band uplink transmission and Ka-band downlink single-pulse self-tracking for satellites. The feed source adopts a dual-band speaker (1), a Ku-band TE21 mode coupler (2), a Ka-band TE21 mode coupler (3), a six-port lantern splitter (4), a Ku-band orthogonal mode coupler (5) and a Ka-band circular polarizer (6); a Ku-band differential mode, a Ka-band differential mode, a ku-band sum mode and a Ka-band sum mode are separated in sequence, and then abeamforming network is used for achieving the composition of a sum and difference beam to meet the needs for satellite communication in motion antenna feeder double frequency and full-simultaneous single-pulse self-tracking.