A refining agent for copper and copper alloy smelting is characterized in that the components of the refining agent are 5 to 15 percent by weight of calcium fluoride, 1 to 5 percent by weight of silicon dioxide, 1 to 5 percent by weight of titanium dioxide, 2 to 10 percent by weight of sodium fluosilicate, 40 to 60 percent by weight of sodium carbonate and the balance sodium tetraborate; the refining agent materials are weighed according to a formula, uniformly mixed, placed into a drying box and dried under 120 DEG C for an hour, and a metallographic inlaying machine is used for manually pressing the refining agent into the shape of a sheet. The refining agent has the advantages that the refining agent is integrated with the functions of deoxidization, degasification, impurity removal and the like, and has strong adsorbing, dissolving and combination slagging capabilities; the surface tension between the refining agent and metal melt is high, the refining agent can promote molten slag to float up, so that the molten slag can be better separated from molten metal, and thereby the effects of refining, impurity removal and melt purification are achieved; the refining agent has high chemical stability and thermal stability, does not have the corrosion effect on metal and the furnace lining, and cannot chemically react with the molten metal, the refining agent and the molten metal cannot be melted into each other as well, and thereby the original composition and properties of alloy are guaranteed; and the refining agent does not have public hazard, is safe and environment-friendly, is convenient to use, and is cheap.