The bean curd machine is based on the principle that protein molecules of soybeans form conjunctiva after being heated, and makes soybeans into traditional foods in China. The mechanical structure of the Yuba machine is a rectangular pot with a sandwich in the middle, and the recessed position is equipped with a smoke pipe, a furnace bridge and water. A stove is arranged at one end of the machine to directly heat the smoke pipe, which is connected by the smoke pipe and covered with water. Water is mainly used for constant temperature. The food contact part is made of stainless steel, and the heating part is made of high quality steel plate. The heating principle is steam eruption heating in pipeline. Fast heating speed and low energy consumption. The pot is divided into small squares to fit the size of yuba. Stainless steel surrounds the Yuba pot, which solves the problems of heavy manufacturing equipment and high cost of the traditional Yuba pot. It also solves the shortcomings of traditional yuba, such as mass production, high energy consumption, uneven joints at the head and tail, low residual pulp in the pot, poor color of yuba, many defective products, large space, large investment and many labors. The structure is scientific and reasonable (a yuba machine with a daily output of 50 kg can be operated by one person), and the fuel can be completely diversified, such as coal, firewood, wood chaff, sawdust, peanut shells and chaff.