Circulation mechanical nitrogen charging method and system for increasing controlled atmosphere insect prevention speed

The invention belongs to the technical field of circulation mechanical nitrogen charging. The invention relates to a circulation mechanical nitrogen charging method and a circulation mechanical nitrogen charging system for increasing controlled atmosphere insect prevention speed, which are characterized in that a zeolite molecular sieve is used as an adsorbent to fill an adsorption tower in a vacuum pressure rotary adsorption nitrogen making machine, and meanwhile, a dry vacuum pump is used for desorbing nitrogen and water molecules adsorbed by the adsorption tower and directly pumping the nitrogen and the water molecules into a closed cabin; a product gas feedback pipeline with a nitrogen feedback flow stabilizing and pressure adjusting device is connected between a raw material gas inlet and a product gas conveying pipeline of the vacuum pressure rotary adsorption nitrogen making machine, and switching of two operation modes of normal-pressure adsorption and vacuum desorption of an adsorption tower is inter