Processing method of Fresnel lens texture mold

The invention discloses a processing method of a Fresnel lens texture mold, which comprises the following steps of: calculating to obtain a required Fresnel lens curved surface according to a quadratic spherical equation and preset geometrical parameters of a Fresnel lens mold; designing a geometric segmentation structure for the circular metal mold conforming to the curved surface of the Fresnel lens; on the basis of the circular metal mold after the geometric segmentation structure is designed, according to the preset height and distribution of the Fresnel lens texture, cutting parameters of the Fresnel lens texture are obtained through calculation; according to the cutting parameters of the Fresnel lens texture, a machining machine is controlled to machine the circular metal mold, the Fresnel lens texture mold is obtained, and the machining machine comprises an ultra-precision five-axis machine tool and a diamond sharp knife installed on the ultra-precision five-axis machine tool. According to the method,