The invention discloses an automatic green packaging system. The automatic green packaging system comprises a conveying system, a sorting system, a carton supply system, a commodity packaging system and a control system. The conveying system comprises a main conveying line and a plurality of sorting conveying lines. Commodities are conveyed through the main conveying line, and after shape and sizeinformation is recognized through a binocular vision part, the commodities are sorted to the various sorting conveying lines according to a certain rule to be conveyed to corresponding commodity packaging lines to be packaged. Meanwhile, the control system controls the carton supply system to match and produce cartons proper in size online according to the shape and size information of the commodities, the cartons are conveyed to the commodity packaging lines for packaging the commodities, and the packaged commodities are gathered and conveyed into a truck loading area to be loaded through afinished product conveying line. The green packaging system is capable of achieving full automation, refining and self-adaptation, a rapid, material-saving and compact-space green packaging scheme isprovided so as to cope with the situation of a large number of packaging demands and the problems of environment pollution, resource waste and the like are greatly reduced.