PSG are on 69 points with four games left with Monaco trailing by 11 points
The win helped the hosts exact revenge against Iran who beat Bangladesh 2-1 in the last edition.
Bangladesh netted all three goals of the Group C match in the second half through Marzia, Moushumi Jahan and Tahura Khatun at the Bangabandhu National Stadium on Saturday.
Bangladesh took the attack to the Iranians from the outset but were denied by the woodword and lost the plot in the final third several times as the game stayed locked at 0-0 at the end of the first half.
After the break, Marzia broke the deadlock in the 63rd minute.