The invention discloses a preparation method of prepackaged pseudo-ginseng steam pot chicken. The preparation method comprises the steps of cutting off hind leg meat and chicken chest meat of a spayed hen, washing, precooking in a saucepan for 8-12min with water which is twice of the hind leg meat and the chicken chest meat in amount, carrying out vacuum knead-salting, adding pseudo-ginseng powder and a seasoner with specific formula, adding precooking fluid which is 60-65wt% of the chicken meat subjected to vacuum knead-salting, performing vacuum packaging, and sterilizing at high temperature and under high pressure, thereby preparing the prepackaged pseudo-ginseng steam pot chicken. The precooking and seasoning process is adopted to achieve the prepackaged pseudo-ginseng steam pot chicken with excellent flavor; the vacuum packaging and the high temperature sterilization processes are adopted, the shelf life of the prepackaged pseudo-ginseng steam pot chicken is greatly prolonged, the prepackaged pseudo-ginseng steam pot chicken can be transported and sold conveniently, and the traditional prepackaged pseudo-ginseng steam pot chicken in restaurants can be consumed favorably by ordinary families.