A web product folding and stacking machine includes two folding line making rolls, two folding fingers, a first carrier unit, a stoppage unit and a holder. The folding line making rolls and the folding fingers are operated to fold up web products on a pad on the first carrier unit to form a stack of interfolded web products. When a stack of a predetermined number of interfolded web products is finished, the stoppage unit is extended out to have the finished stack of interfolded web products be carried with the holder and the stoppage unit to a predetermined location for delivery. Subject to the effect of the pad on the first carrier unit, web products are effectively folded up and stacked in a neat status.