The utility model discloses a tool for manufacturing multiple sections with the same aperture. The tool comprises a section mold and an opened gluing mold, wherein the section mold comprises a plurality of cross-sections; a plurality of section through holes of which the sizes and the shapes are the same are formed inside the cross-sections; adjacent section fixing holes are formed in side edges of the cross-sections; fixing rods penetrate through the cross-section fixing holes to be fixedly connected with different cross-sections; the fixing rod and the cross-sections are perpendicular to each other; the cross-sections are parallel to one another; two groups of counterpoint step grooves which are parallel to each other are formed in the opened edge of the gluing mold; the distance between counterpoints of each group of the counterpoint step grooves is identical to the length of the fixing rod; the gap between the two groups of the counterpoint step grooves is identical to that among the fixing rods on the cross-sections. The tool for manufacturing multiple sections with the same aperture has the characteristics that the production efficiency is high, the manufacturing cost is low, the consistency of the sections is good, and the maintenance is convenient.