The invention discloses an asymmetrical digital subscriber line bandwidth polymerization method which bundles two telephone subscriber lines together to be used in pair, wherein, one telephone line is configured and used according to the standard of International Telecommunication Union G.992 ADSL; the asymmetrical digital subscriber bandwidth polymerization method is characterized in that the other telephone line is configured and used in the up and down transmission direction which is opposite to the standard configuration, namely, a piece of user terminal equipment is arranged at one side of the telecommunication bureau room of the telephone line while the external interface of the terminal equipment and the external interface of the local terminal access module of the normal telephonelines are bundled in parallel for use; the local terminal access module of a signal-channel digital subscriber line is arranged at one side of the user residence of the telephone line while the external output interface of the local terminal access module and the external interface of the user terminal equipment of the normal telephone lines are bundled in parallel for use. The invention also provides an ADSL broadband realization system and access equipment.