The experimental test bench for cargo doors is fundamental for testing civil aircraft cargo doors. This paper presents the design of a test bench for a cargo aircraft cargo door. To verify whether the test bench meets the design requirements, a load analysis was conducted on the bench. The analysis takes into account a comprehensive simulation of unidirectional load, torque load, high and low temperatures, as well as temperature load with a temperature change rate. Through computational analysis, a cargo door test bench structure that satisfies the functional requirements and test objectives was obtained, providing a reference for related designs and supporting the subsequent related tests.