The invention relates to an environment-friendly prevention and control method of panax notoginseng diseases and belongs to the technical fields of plant disease prevention and control and plant cultivation. The prevention and control method comprises land selecting and soil preparation, panax notoginseng planting and seed handling and growing period management, wherein thoroughly-decomposed cow dung, begasses, compound fertilizers and plant ash are mixed according to the volume ratio of 5:4:1:1; 6000-10000kg/hm<2> of improved soil is adopted; xiandi, 1cm of marigold limbs and trichoderma harzianum are applied after ditching and less xiandi is used for mixing with roots before transplanting; crofton weed and the marigold limbs are covered on a moisture face after transplanting, bottom-ventilated row covers are constructed, two sides of the bottom-ventilated row covers are vertical to the ground, and the bottom-ventilated row covers are 15cm in length, 1.8m in width and 1.2m in arc height; the trichoderma harzianum and the marigold infusion are applied in a sprayed mode according to the ratio of 1:200 after emergence of seedling to irrigate roots, and 100g/L of jasmonic acid methyl ester are applied to leaf faces in a sprayed mode. The environment-friendly prevention and control method has the advantages of being simple in operation, low in cost and easy to popularize, protecting the environment, being environment-friendly and the like, lays a good foundation to pollution-free planting of the panax notoginseng and has good economic benefits, ecological benefits and social benefits.