The invention discloses a multi-angle micro-shape cutting machining device and machining method, and belongs to the technical field of cutting devices. The multi-angle micro-shape cutting machining device comprises a base, wherein a cutting groove is formed in the top of the base, and a workpiece angle adjustment and fixation mechanism is installed in the base; the top of the workpiece angle adjustment and fixation mechanism extends into the cutting groove; and a collection bin is formed in one side in the base, and a limit mechanism is fixed to one side away from the collection bin, of the base. According to the multi-angle micro-shape cutting machining device and machining method, the workpiece angle adjustment and fixation mechanism is installed in the base, stable fixation can be carried out on a cutting workpiece by virtue of the adsorption effect of a plurality of groups of adsorption discs; and meanwhile, the heights of the adsorption discs can be changed by virtue of third lifting cylinders at the bottoms of the adsorption discs, then the inclination angle of the workpiece on the workpiece angle adjustment and fixation mechanism is controlled, then inclination cutting can be carried out on the surface of the workpiece through cooperation with a cutting mechanism, and frequent change on the position of the workpiece is not needed in the cutting process, so that the multi-angle micro-shape cutting machining device is more convenient to use.