The invention discloses a mutually clamped and leaned optical lens group. The mutually clamped and leaned optical lens group at least comprises a first lens and a second lens, wherein the first lens and the second lens comprise an optical part and a non-optical part encircling the optical part respectively; a first flange is formed on the surface, facing the first lens, of the non-optical part ofthe second lens; the surface, facing the second lens, of the non-optical part of the first lens is provided with a first elastic part corresponding to the first flange; the first elastic part is sleeved with the first flange; and the outer diameter of the first flange is not smaller than the inner diameter of the first elastic part or the inner diameter of the first flange is not larger than the outer diameter of the first elastic part. In the mutually clamped and leaned optical lens group, the first lens and the second lens are stably connected with each other by adjusting the deformation ofthe first elastic part; and the first lens and the second lens are coaxial with each other, so the stability and the imaging quality of the optical lens group are enhanced.