The invention relates to a side valve rod forced seal ball valve. The side valve rod forced seal ball valve comprises a valve body, a first valve seat and a valve ball; the first valve seat moves backand forth in the direction of the valve ball and engages with the valve ball to realize forced seal; the side valve rod forced seal ball valve is provided with a first driving wheel and a second driving wheel, wherein the first driving wheel is used for driving the first valve seat to move, and the second driving wheel is used for driving the valve ball to rotate; the first driving wheel and thevalve seat are coaxial; and the first driving wheel drives the second driving wheel to rotate and is driven by a side valve rod to rotate. The side valve rod forced seal ball valve has the beneficialeffects that the valve ball is driven to rotate through the second driving wheel, the second driving wheel and the valve rod do not bear the pressure generated when the valve ball is at the closed position, and therefore the operation torque is remarkably decreased, and the phenomenon that the forced seal operation of a valve is hindered due to the pressure borne by the valve ball can be avoided;and the valve rod drives the valve ball to rotate by driving the first driving wheel, so that a transmission structure can be more compact and can be adapt to more valve body structures, a driving structure of the valve ball can also be more reasonable, and the reliability can be higher.