Abstract: A multiport mold cooling apparatus for eliminating or reducing rhomboid errors and materials cracking defects during the production process. The multiport mold cooling apparatus includes a support base assembly including a housing having side walls, an open top and bottom, and further having holes disposed through the side walls; and also includes a tubular mold support member being removably disposed in the housing and being adapted to removably receive a mold therein; and further includes a plurality of water blocker members being removably disposed in the housing and about the tubular mold support member; and also includes a restriction-free water flow assembly including a plurality of restriction-free water flow members being removably disposed in the housing and about the tubular mold support member; and further includes a water flow control assembly being mounted to the support base assembly.