Abstract: In order to reduce the weight of the round link chain of the scraper conveyor and improve the contact state between the links, the finite element contact analysis on the round link chain was carried out through ANSYS Workbench, and the topology optimization collaborative response surface optimization method was used in the optimization research of the chain link. The research results show that: during the tension of the circular chain, there are obvious stress concentration phenomena at the contact parts between the two links and the transitional connection between the straight cylinders and the circular links, and the maximum equivalent stress and equivalent strain are 400.04 MPa and 0.00195 respectively. Without compromising the stiffness of the chain link, topology optimization reduces the mass of the chain link from 2.841 kg to 2.733 kg, which is a reduction of 3.70%, but does not improve its contact state; On the basis of topology optimization, response surface optimization is used to perform the second optimization on the chain link. And response surface optimization reduces the weight of the chain link to 2.743 kg, which is a reduction of 3.35%. At the same time, the maximum equivalent stress and maximum equivalent strain of the link are also reduced by 6.08% and 6.67%, respectively, which improves the contact state.