The structure and principle of the automatic popcorn machine: it is mainly composed of a pot body, a rack body, a stirring system, a heating system, a speed-regulating transmission device, a stirring shaft, a pot turning system, etc. One stamping to form a stainless steel hemispherical pot body; Liquefied gas, natural gas, electromagnetic heating and other forms; Special oblique transmission mode is adopted, and there is no stirring dead angle; Advanced transmission and sealing structure is adopted to make the transmission part and pot body clean and hygienic; Frequency conversion speed regulation power supply is adopted, and the operation is more stable; Hydraulic lifting is used to quickly turn the pot out of the pot, saving manpower and reducing labor intensity.