An exemplary clamping fixture (100) for washing optical members (60) includes a base (10), two clamping elements (20, 30), and a securing member (40). The base defines a plurality of holding grooves (13) configured for holding a first portion (61) of each of the optical members therein. The clamping elements are disposed at two sides (12) of the base. Each of the clamping elements has a plurality of holding slots (22) defined therein. The holding slots are configured for holding a second portion (62) of each of the optical members. The securing member is configured for securing the clamping elements and the optical members together in such a manner that the optical members can be removed from the base.