This process line uses double screw extruding technique to replace the traditional steam boiling process. It includes mixing, cooking, extruding and shaping process, no needing boiler with simple process, high efficiency and little pollution. The raw materials can be the rice powder, corn powder, wheat flour individually or their mixture. Only by changing the moulds, shaping or cutting machine, the shapes can be various: like sticks, square sheet rib chips, diamond chips, wavy chips, pillow shapes and bugles etc. The taste is good and also without greasiness.