Wide-angle fixed-focus distortionless visual optical lens

The utility model relates to the technical field of optical imaging, in particular to a wide-angle fixed-focus distortionless visual optical lens, which comprises a fixed seat, swallow-tail-shaped plates welded on the side surface of the fixed seat in an up-and-down symmetrical manner, and lens fixing mechanisms arranged on the side surface of the fixed seat in a left-and-right symmetrical manner. A second lens, a first lens, an optical lens combination and an optical filter are sequentially arranged in the fixing mechanism from front to back, a fixing ring is arranged on the outer side of the optical filter and is in threaded connection with the fixing mechanism, a first limiting ring is arranged on the outer side of the first lens, and a second limiting ring is arranged on the outer side of the second lens. The first limiting ring and the second limiting ring are both in threaded connection with the fixing mechanism, a locking mechanism of the lens is arranged in the fixing mechanism, the fixing mechanism i