Abstract: The paper uses orthogonal design to investigate tribology properties of EAK, SCO and T304, which are used as extreme-pressure additives in the emulsion for cold-rolling of copper plate, and analyzes the influence of the three additives on the extreme pressure and anti-wear performances of the basic oil. This paper also offers the best compound proportion of additives by studying the cooperative lubrication performance of different types of compound additives and tests the lubricity of extreme-pressure compound additives through cold-rolling experiments. These experiments show that: EAK has greatest influence on the extreme pressure and anti-wear performances of the basic oil, followed by SCO and T304， the compound additive of SCO and EAK promotes the basic oil remarkably in terms of load-carrying capacity and the extreme pressure and anti-wear performances, and its best compound proportion is 6:1，the emulsion with EAK-SCO compound additive can not only effectively reduce the friction and energy consumption in rolling, but also ensure an even and smooth surface of the rolled copper plate, therefore it has good application prospects in the rolling of copper plate.