For the design on dual-servo motor with clamp open/close cam linkages mechanism of one linear type blow-molding machine, there are two sets of cams with horizontal movement in the opposite direction and a bottom mold template for vertical moving action. The use of two independent servo motors as driving force generates rocker arm 30 degrees from the conjugate cams. The driving force goes through two groups of linkage mechanism to move clamp templates independently. One group of linkage mechanism drives movement of bottom mold through four-bar linkage with a plate cam correspondingly to clamp open/close. In this paper, based on the Vector Loop method and Newton's laws of motion, we establish motion analysis, static analysis in mathematical formula to calculate input torque and force on linkage and connectors. Furthermore, we consider boundary condition of linkage mechanism and design requirements, and refer to basic cam curve (MS) to form bottom mold design cam curve. Then we utilize theory of envelope to calculate profile of cam. Finally, we compare related linkage and connectors of single-servo mechanism with dual-servo mechanism.