The invention discloses an optical lens component, which can ascertain the concentric degree of lens group when the lens is moving. It comprises many optical lenses; at least two lens cylinders, fixed seat and correcting device, wherein the optical lenses can be at least divided into two lens groups; two inner lens cylinders are separately used to accommodate the corresponding lens group and form first lens group and second lens group; fixed seat is used to accommodate the lens groups; correcting device can ascertain the concentric degree of each lens. On assembling process, after double-correcting, at least one part outer shape structure of one inner lens cylinder of lens group is used to accommodate the inner structure of anther inner lens cylinder, and at lest one part structure forms precision matching; the locating structure of two lens groups are connected with the rail of fixed seat by locking element so that the lens group can slide in fixed seat.