A mold structure (100) includes a press board (20), a lower mold (10) and at least one locking mechanism (40) configured for locking the press board to the lower mold. The at least one locking mechanism includes a locking element (41), a slidable block (46) and a driven apparatus (42). The locking element engages with the press board and the lower mold along a first direction. The locking element defines a locking hole (4124). The slidable block engages in the locking hole along a second direction. The driven apparatus drives the slidable block to move along the second direction for pressing the press board to the lower mold along the first direction.