The invention relates to a controlled active panax pseudoginseng total root preparing method belonging to the technical field of panax pseudoginseng preparing processes. The controlled active panax pseudoginseng total root preparing method comprises the five steps of pretreatment, pre-freezing, sublimation drying, resolving and discharging-packaging. According to the method, a modern sensing technology is combined with a freeze-drying technology, so that the temperature and the humidity of a preparing process are accurately controlled, and time is not required to be set; a freezing process and a heating process are intermittently carried out, so that energy is saved. Active ingredients which are contained in fresh panax pseudoginseng treated through the method are not destroyed. The fresh panax pseudoginseng keeps the original appearance, and is good in reconstitution property, easy to grind and long in shelf life; meanwhile, the method is simple, the practicability is high and the controlled active panax pseudoginseng total root is suitable for large-scale production.