Pressure cooker, also called pressure cooker, is a kind of kitchen utensil. The boiling point of the liquid in the pressure cooker at a higher pressure will enhance this physical phenomenon, so that the water can reach a higher temperature without boiling, so as to speed up the efficiency of stewing food. It can be used to heat the cooked food to more than 100 ℃. In high altitude areas, the use of pressure cooker can avoid the problem of reducing the boiling point of water and making it difficult to cook food.