The invention discloses a linear low-voltage molded case circuit breaker electromagnetic component full-automatic assembling and welding line, which comprises a lower-layer table top and an upper-layer table top which are fixed in the longitudinal direction, wherein vibration conveying mechanisms are sequentially arranged on the lower-layer table top from front to back; a U-shaped sliding groove is formed in the upper-layer table top in the longitudinal direction, a chain is installed in the U-shaped sliding groove, the chain is provided with its own step driving mechanism, and a plurality of dual-station clamps are sequentially arranged on the chain at intervals; the chain enters from the front end of the U-shaped sliding groove, moves downwards from the rear end of the U-shaped sliding groove, and then returns to the front end of the U-shaped sliding groove from the lower part of the U-shaped sliding groove; the upper surface of the chain is sequentially provided with 12 stations from front to back by means of the 12 dual-station clamps; feeding mechanisms and a dual-soldering mechanism stretch across above the U-shaped sliding groove from front to back in sequence; and a master controller is further installed on the upper-layer table top, and electrical components of all the mechanisms are in signal connection with the master controller. The linear low-voltage molded case circuit breaker electromagnetic component full-automatic assembling and welding line has the advantages of compact structure, reliable operation and high welding quality.