How do praying mantis's kill there food?

This depends on what species we are talking about. I we are talking about the average mantis that you may find, such as Tenodera sinesis, they will generally either wait for their prey to come to them, using camoflage to keep their prey off guard, or they will slowly stalk their prey, silently and generally unnoticed. However, some mantids will actively seek out ant hunt their prey, not caring for stalking or hiding at all.