The invention relates to a control device for an automotive active steering system. The device comprises an AFS target rotating angle determining module, an assisted displacement motor adjusting module, an EPS target torque determining module, an assisted motor adjusting module and a coordination control module, wherein the AFS target rotating angle determining module is combined with the coordination control module to provide a target rotating angle value for the assisted displacement motor adjusting module; the EPS target torque determining module provides a target torque value for the assisted motor adjusting module; the coordination control module is communicated with an EPS control unit through a CAN bus; the AFS target rotating angle determining module comprises a target transmission ratio setting sub module, a target rotating angle calculating sub module and an expected heading angle speed calculating sub module, wherein the target transmission ratio setting sub module calculates a transmission ratio R according to the automotive speed u and an ideal angle transmission ratio curve; and the target rotating angle calculating sub module calculates a target rotating angle value theta m4d according to the rotating angle theta S of a steering wheel and the transmission ratio R.