Abstract: A suspension system of an optical actuator is arranged such that an oscillation member of an actuator is mounted, in a movable manner, on a base, and the base comprises an assembly opening formed in a central portion thereof, the assembly opening being provided with a positioning seat on each of at least one diagonal bisection line. The oscillation member that comprises an optical lens is supported on the base by two flexible members so as to form a suspension system of an optical actuator. The two flexible members are each a plate-like structure and has two opposite side edges each formed with a shaped trough with a portion therebetween forming a bridge, and two sides of the bridge are corresponding to tangential lines of positioning curves of the shaped troughs.