Temperature of cooling roller is a key issue affecting the quality of the amorphous ribbon. To this end, heat flux distribution acting on cooling roller outer wall calculated by fluid dynamics software Fluent, cooling roller steady temperature field analyzed with Finite Element Method by heat flux boundary conditions, obtained the cooling roller inner and outer wall temperature distribution, and discussed the temperature of cooling roller as cooling roller thickness and water passage height. The results show that cooling roller outer wall temperature decreases with roller thickness and the cooling water passage height decreased; Cooling roller inner wall temperature decreases with roller thickness increased and the cooling water passage height decreased. Meantime, the appropriate roller thickness and passage height selected to keep cooling roller both inner and outer wall temperature within the certain range. The study result provided theoretical support for cooling roller design and optimization.