Abstract: The present invention provides a control device for continuously variable time and cross section which is added the throttle control valve 10, the element 8 of throttle control valve and the relevant drive mechanism 1 in the regular intake and exhaust system of internal combustion engine. The throttle control valve 10 is fixed in the cavity, which is composed of the fluid flow passage 11 in the cylinder head 7, the valve seat 12 and the valve 9. The throttle control valve 10 is cylindrical, and its axis of motion is just the same as that of the valve guide or is parallel with it. Through controlling the relative movement between the valve 9 and the throttle control valve 10 it is flexible to adjust the cross-section area of fluid flow passage, effective valve phase, working time, effective lift and swirl intensity of fluid movement in the course of periodic opening and closing of valve.