The utility model discloses an adjustable type structure of bottom wire inlets of an optical distribution frame and relates to the field of an optical distribution frame. The adjustable type structure comprises a box body, the bottom of the box body is provided with the wire inlets, the bottom of the box body is further provided with drawing brackets, the drawing brackets are provided with drawing plates, and the drawing plates cover the lower parts of the wire inlets. The adjustable type structure solves the problem that the size of wire inlets of an optical distribution frame is fixed, and the wire inlets are easy to enter by mice and the like, so using is influenced in the prior art; and the drawing brackets cover the wire inlets, adjustments of the open size of the wire inlets are achieved, the mice are prevented from entering, and internal equipment is effectively protected.