Nowadays,the　adjoint　method　has　become　a　popular　approach　in　the　optimization　of　turbomachinery　to　further　improve　its　aerodynamic　performance.However,design　variables　in　these　adjoint　optimization　applications　are　generally　not　direct　design　parameters　of　blade(such　as　wedge　angles　or　maximum　thickness),making　the　geometric　variation　by　adjoint　optimization　can　hardly　be　re-extracted　as　the　change　of　each　design　parameter.By　giving　considerations　to　the　G1　continuity　constraint　of　adjoint　method　on　its　parameterization　method,this　manuscript　shows　how　to　apply　a　parameterization　method　in　3D　blade　design　process　into　adjoint　optimiza-tion.Nearly　all　design　parameters　can　therefore　be　treated　as　design　variables　in　the　adjoint　method　and　then　participate　in　the　sensitivity-based　optimization.Finally,a　fitted　Rotor　67　blade　is　opti-mized　and　the　adiabatic　efficiency　is　significantly　improved　by　nearly　0.91％.