The invention provides a large-angle secondary light-distribution lens of LED streetlamp and a manufacturing method thereof. The secondary light-distribution lens comprises a first light-distribution lens and a second light-distribution lens, wherein the first light-distribution lens is a semi-spherical surface or an elliptical non-spherical surface, while the second light-distribution lens is a peanut shell-shaped asymmetrical curved surface and is formed by a main curved surface and a glare elimination curved surface with two ends jointed; according to the actual streetlamp illumination demand, a matching method of controlling network node normal vectors through the curved surface is utilized to obtain the normal vectors of each point on the two curved surfaces; and accordance relationship of an included angle between corresponding incidence rays in x and y directions and a vertical optical axis and an included angle between emergent rays passing through the two curved surface is combined to obtain the grid line profiles of the two surfaces, so as to form a whole free curved surface. The obtained secondary light-distribution lens can be used for distributing an LED beam into an even rectangular facula which is distributed in 0-+/-71degrees along horizontal X direction and in 0-+/-30 degrees along Y direction, and the horizontal glare is effectively eliminated to accord with the road surface illumination demand.