Placing mechanism

The utility model discloses a placing mechanism, and relates to the technical field of optical chip production. The device comprises a first base, first insertion blocks which are symmetrically distributed are fixedly arranged on the outer side of the first base, a second base is movably inserted into the side, close to the first insertion blocks, of the first base, and second insertion blocks which are symmetrically distributed are fixedly arranged on the side, away from the first base, of the second base. A third base is movably inserted into the side, close to the second inserting block, of the second base, and a first supporting plate is fixedly arranged on the outer side of the first base. According to the utility model, by arranging the first base, the second base and the third base, the placing block can be moved front and back, front and back, and left and right, so that the optical chip can be conveniently processed in the production process; according to the utility model, the bidirectional screw ro