Taking lifting-lug of hydrostatic test device as a research object, the physical model of lift-ing lug has been established by the Pro/E, and static analysis and topology optimization have beenmade by ANSYS workbench.On the premise of safe and reliable working, reduced model of liftinglug, which quality is reduced by 30%, obtained from topology optimization.Parametric modeling ofthe reduced model has been made by ANSYS workbench and further optimization design has beendone fo reduce 30% of the deformation.Furthermore, this design fills the gaps in the field of designand research of parts and accessories of hydrostatic test device.