The present invention relates to a landing vibration isolating and buffering device and an implementation method for large size silicon single crystal. The device includes a top housing, a flexible stress spring, an external housing, a vibration transfer rod lower spring, a vibration isolator, an elastomer and a buffer, wherein the vibration isolator includes a vibration receiving rod, a torsion spring, a vibration transfer rod and a vibration outputting rod. The buffer consists of a coil, a magnet and a strong vibration transfer rod. The magnet of the buffer is used to cut the motion of magnetic induction lines to realize a vibration attenuation effect of damping and buffering. The torsion spring of the vibration isolator and the vibration transfer rod lower spring are used to realize a vibration damping effect of high sensitivity and fast response speed for slight vibration. The effect is that, the method of increasing system damping quantity for the magnet coil is first used to realize fast and significant attenuation of vibration and reduce the potential risk of damaging the crystal bar due to vibration; and when the vibration decreases or the frequency of the vibration sourcebecomes lower, the vibration isolator both protects the internal structure and improves performance of vibration isolating.