The invention relates to a variable-wing vertical axis resistance type wind turbine comprising blades, pendulum bars, pendulum bar pins, connecting rods, pins, a rack cylinder, a top cover, an output shaft and limit stops. A set of four-bar linkage is formed by two pendulum bars, the connecting rods and the rack cylinder; the outer end of each pendulum bar is fixedly connected with a wind blade; the rack cylinder is provided with eight sets of blades vertically and each set of blades are uniformly staggered; When the wind blows to the blade, the blades at the windward side on the rack cylinder are rotationally unfolded about a rotation axis formed by the blades and the rack cylinder under the effect of wind power, in a similar way, the blades at leeward side are rotationally folded, the two pendulum bars help each other to move under the linkage effect of the connecting rods; the unfolding and folding angles of the blades are limited by the limit stops. During the rotation of the rack cylinder, the wind blades automatically adjust the attitude as the wind angle changes to increase the windward area of the windward side blades and reduce the leeward area of the leeward side blades, therefore, the resistance of the leeward blades is effectively reduced and the wind energy utilization rate of a wind turbine is increased.