The invention discloses a near infrared optical lens. The near infrared optical lens comprises right eyeglasses successively arranged from an object side to an image side, wherein the first eyeglass is crescent-shaped, has negative focal power and has a convex surface oriented towards the object side; the second eyeglass is crescent-shaped, has negative focal power and has a convex surface oriented towards the object side; the third eyeglass is biconvex-shaped and has positive focal power; the fourth eyeglass is crescent-shaped, has positive focal power and has a convex surface oriented towards the image side; a doublet is formed by combining the fifth eyeglass with the sixth eyeglass; a seventh eyeglass is biconvex-shaped and has positive focal power; and the eighth eyeglass is crescent-shaped, has positive focal power and has a convex surface oriented towards the object side. The near infrared optical lens, through adoption of different eyeglass combinations and utilization of focal power distribution, has good performance of wide aperture, large visual angle and small distortion, and can effectively realize a heat difference elimination effect by use of a full glass structure.