The structure,work principle and design of critical components of SZX12×2 twin-screw press were briefly described,the working mechanism of the barrel was also analyzed.The application effects of the twin-screw press in some oil plants were investigated.The result showed that the actual production capacity of the twin-screw press could reach more than 74% of the rated output,the oil recovery was above 92% and the residual oil rate in cake was 3.6%.Compared with single-screw press,the twin-screw press could save 30%-40% energy.Both cold oi...