The invention relates to a technique for processing bronze alloy which is environment-friendly and easy to cut. The technique comprises the following steps of mixture, melting, refining, analysis, casting, straightening, saw cutting, inspection, package and warehousing. The compositions in weight percentage of the bronze alloy are 2.0 to 10.0 percent of tin, 3.0 to 12.0 percent of zinc, 2.0 to 8.0percent of bismuth or 2.0 to 8.0 percent of the bismuth and 0.1 to 0.5 percent of nickel (plumbum, stibium, iron, phosphor, sulfur, silicon and aluminum), less than or equal to 0.5 percent of unavoidable impurities, and the balance being copper. The copper or the copper and the nickel are thrown into a smelting furnace hearth for smelting; the tin, the bismuth and the zinc are added into the smelting furnace hearth after melting; the liquid level is covered with calcined charcoal; after complete smelting, the temperature is raised and the refining is performed, wherein the temperature is between 1,100 and 1,250 DEG C and the time is between 10 and 30 minutes; after stirring and sampling, horizontal continuous casting is performed; and a crystallizer is a water-cooling crystallizer which islined with a high-purity graphite sleeve, wherein the casting temperature is between 1,140 and 1,220 DEG C, the speed is between 15 and 30 meters per hour, and the cooling water pressure is between0. 01 and 0.05 MPa.