A hand-press coffee machine comprising a water tank, a hand pump which is disposed at the upper end of the water tank, and a brewing component which is connected to the lower end of the water tank; a water hole is disposed at the point where the water tank and the brewing component are connected; the hand pump is used to pump the water in the water tank into the brewing component through the water hole; a unidirectional valve, which is disposed in the water hole between the water tank and the brewing component, is set to merely allow the water in the water tank to flow into the brewing component; the present invention can effectively protect the coffee powder from being pre-soaked.