After both the teams failed to break the deadlock in regulation and extra time, the match went into penalty shootout, which ended with the semifinalists locked at 4-4.
Bengal emerged victorious and made the final for the 44th time after Moirangthem Basanta found the net and Lalbiakhlua's shot was saved by Sankar Roy.
In the penalty shootout Lalrammawia Rammawia, substitute Ramfangzauva, Lalrammuanpuia, and Lalalrinchhana Rcha were on target for Mizoram, while Fialmuanawma Muanawma's shot was saved by the rival keeper.
Bengal have won the tournament 31 times and will meet the winners of the second semi-final between host Goa and Kerala.