NOVELTY - Planting radix isatidis in clay soil block comprises e.g. fertilizing clay soil blocks using e.g. decomposed fertilizer and urea, preparing flat bed for sowing, soaking radix isatidis seeds in a medicinal liquid comprising e.g. rhizoma coptidis and pokeberry root, mixing with plant ash, and sowing, managing field by intertillage weeding and topdressing, spraying e.g. molybdenum and zinc fertilizers on the leaf surface during folium growth period, preventing pests and diseases by spraying an anti-pest agent, harvesting radix istadis, cutting shoots and using the qualified leaves as medicine.    USE - The method is useful for planting radix isatidis in clay soil block.    ADVANTAGE - The method utilizes various fertilizers and hence can greatly improve the yield of the radix isatidis, and prevents radix isatidis plant diseases and insect pests, and purifies radix isatidis growth environment by spraying the traditional Chinese medicinal liquid.    DETAILED DESCRIPTION - Planting radix isatidis in clay soil block comprises selecting well-drained, fertile and loose clay soil blocks for planting, fertilizing using (in kg/acre) decomposed fertilizer (4000-5000), diammonium phosphate (50-80), potassium sulfate (20-30), and urea (15-20) of waste bag material (1500-2000 kg) obtained after cultivating and fruiting mushroom, uniformly spreading on the ground at a depth of 30-40 cm, and preparing into a flat bed for sowing; soaking radix isatidis seeds in a medicinal liquid comprising 10-15% of traditional Chinese medicinal extract at 40-50 degrees C for 10-12 hours, taking out, drying, mixing with plant ash, and sowing seeds during early April, where the medicinal liquid is prepared by decocting (in parts by wt.) rhizoma coptidis (8-10), unbracteolated spurge root (8-10), Paulownia saw powder (10-12), stone tree root (8-10), common Cnidium fruit (8-10), and pokeberry root (8-10) in water, collecting the filtrate, concentrating into dry powder to obtain the traditional Chinese medicinal extract, and preparing the powder into a medicinal liquid with 10-15% of the extract; managing field by intertillage weeding when the height of the seedling is 8-10 cm, planting seedling at a distance of 7-10 cm, topdressing several times after weeding by applying (in kg) calcium superphosphate (10-15), soybean cake meal (100-120), potassium sulfate (10-15), ferrous sulfate (2-3), manganese chloride (0.5-1), Paulownia saw (30-40), and complex microbial fertilizer (3-5), where the effective viable cell number in the complex microbial fertilizer is greater than or equal to 0.2 hundred million/g, watering during dry conditions, clearing the drainage ditch during rainy season to prevent erosion and infectious disease, and spraying molybdenum fertilizer, zinc fertilizer, and boron fertilizer (each 0.1-0.2%) on the leaf surface during the folium growth period once in three weeks; preventing pests and diseases by spraying traditional Chinese medicinal anti-pest agent (diluted with 300-400 times of water) once in 1-2 months during the whole growing period, where the anti-pest agent comprises (in parts by wt.) (8-10) rhizoma nardostachyos, unbracteolated spurge root (8-10), radix stemonae (10-12), Passiflora wilsonii leaf (8-10), and Eucalyptus leaf (8-10), and is prepared by decocting the above mentioned herbs in water, and concentrating filtrate to dry powder; and harvesting radix istadis 2-3 times per year, the first time during mid-June, the second time during last ten days of August, and the third time during November, combining the roots, cutting shoots, and using the qualified leaves as medicine.