Four kinds of deformed aluminum alloys were tested. One kind of RE-Al-Mg-Si alloy, which possessed high conductivity and strength, was the first priority by contrast test. The large specification bus of conducting aluminum all- oys was made by thermomechanical process during the industrial experiment. The properties of the bus are as follows: the tensile strength at is 238 MPa, the conductivity (v.s. IACS) is 54.3%, and the current-carrying capacity is beyond 3.1 kA during working process. This kind of RE-Al alloy bus has been applied to several electrical transmitting and trans- forming work. The kinds of deformed aluminum alloys were tested. One kind of RE-Al-Mg-Si alloy, which possessed high conductivity and strength, was the first priority by contrast test. The large specification bus of conducting aluminum all- oys was made by thermomechanical The kind of of the bus is as follows: the tensile strength at is 238 MPa, the conductivity (vs IACS) is 54.3%, and the current-carrying capacity is beyond 3.1 kA during working process. RE-Al alloy bus has been applied to several electrical transmitting and trans-forming work.