A top-pulling linear micro driving mechanism for rotary motion is a key mechanism used by a photoelectric control system arranged in an inertial confinement nuclear fusion device and aims at solving the problem that the crystal optimum matching angle cannot be adjusted easily in the frequency conversion process of the photoelectric control system arranged in the inertial confinement nuclear fusion device presently. A stepping motor of the top-pulling linear micro driving mechanism is connected with a bearing base of the top-pulling linear micro driving mechanism, the bearing base is connected with a fixing frame, and a lead screw is connected with the stepping motor through a coupler. An inner ring of a first rolling bearing is positioned by a shaft shoulder of the lead screw, and an outer ring of the first rolling bearing is positioned by the bearing base. An inner ring of a second rolling bearing is positioned by an inner check ring, and an outer ring of the second rolling bearing is positioned by an outer check ring. A nut is connected with the lead screw, and a pre-tightened spring is arranged between the outer check ring and the nut. The top spherical end surface is contacted with a moving frame, a support is fixed on the moving frame, an outer spring is fixed between the bearing base and the support, and a plurality of cover plates are fixed on the bearing base. The top-pulling linear micro driving mechanism is used by a frequency conversion module arranged in the inertial confinement nuclear fusion device and can achieve crystal optimum matching angle adjustment.