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A magneto-optical head lens actuator was developed for use at a high information bit rate and high density recording. A high bit rate at the outer diameter of a 300 mm disk (velocity = 27.3 m/s) was attained by mounting an aspherical plastic lens and optimizing the shape of lens holder for achieving higher spurious frequency over 30 kHz, utilizing the finite element method (FEM). Another approach was focused on reducing gain peak at the natural frequnecy by adopting "multi-wire" and a silicone "gel box" damping system for stabilizing the pull-in characteristic for focusing and tracking. By the actuator realization, a high density recording of 0.34 µm/bit and high information bit rate 80 Mbps (1, 7 code modulation) recording were attained.