Abstract: A production line of an air conditioner mounted with a work bench for mass-producing indoor units and outdoor units, the work bench including a pallet supply section; an outdoor unit work part mounted at one side of the pallet supply section with a parts assembly section, refrigerant tube vacuum forming and refrigerant infusion section, refrigerant infusion tube removal section, control unit assembly section, refrigerant leakage inspection section, cabinet assembly section, packing section, forwarding and loading section in that order; an indoor unit work part mounted at the other side of the pallet supply section with first pallet feeding section, parts assembly section, noise inspection section, second pallet feeding section, packing section and forwarding and loading section in that order, and integrally installed from parts assembly section of the outdoor unit work part to cabinet assembly section; performance inspection section mounted between the cabinet assembly section and packing section of the outdo