The invention discloses seedling raising soil for seedling raising of wheat stock seeds in a greenhouse. The seedling raising soil comprises, by weight, 40-80 parts of sandy soil, 15-35 parts of rectorite compound, 15-20 parts of soil conditioner, 30-50 parts of wormcast, 15-35 parts of wheat bran, 15-25 parts of peanut shell powder, 2-8 parts of shrimp shell powder, 1-2 parts of EM microbial agent, 5-15 parts of ammonium nitrate, 10-16 parts of calcium magnesium phosphate fertilizer, 10-18 parts of potash magnesium sulphate fertilizer and 1-4 parts of sodium alginate. The rectorite compound is prepared in the steps that lignin fibers and sodium hydroxide are stirred, filtered and washed to be neutral, rectorite, hydroxyl silicone oil and dimethyl sulfoxide are added and continue to be stirred, filtered and washed to be neutral, hydrochloric acid is added and stirred, tetrabutyl titanate is added for ultrasonic dispersion, heating and standing are conducted, the product is filtered anddried, and the rectorite compound is obtained.