The seakeeping performance of logistics support floating dock is studied by model test. The physical model and mooring system model of the floating dock are designed. The rolling damping and pitch damping of the floating dock are obtained by still water attenuation test. The motion Response Amplitude Operator (RAO) curve of the floating dock is obtained by Regular Wave (RW) test, and is compared with the numerical calculation model to verify the validity of each other. The motion performance and four-point mooring performance of the floating dock are analyzed by Irregular Wave (IRW) test, and are compared with the numerical calculation model. The results show that the model test is in good agreement with the numerical calculation model, which can provide relevant reference basis for the design of logistics support floating dock.