The invention discloses a coated fertilizer for promoting the growth of a strawberry root system. The coated fertilizer is characterized by being prepared from the following raw materials in parts by weight: 19-26 parts of sauce residue powder, 14-19 parts of waste Chinese medicine residue powder, 0.4-1.0 part of ferrous sulfate, 0.3-0.5 part of manganese sulfate, 0.03-0.05 part of NAA, 0.06-0.2 part of compound sodium nitrophenolate, 3-5 parts of vermiculite powder, 10-13 parts of green grass powder, 12-15 parts of rice bran, 16-21 parts of rape seed cake, 15-19 parts of ammonium dihydrogen phosphate, 1-2 parts of dicyandiamide, 3-5 parts of tung oil, 13-16 parts of sweet wormwood extract, 7-14 parts of urea, 7-9 parts of EM bactericide, 9-12 parts of soil conditioner and a proper amount of water. Nutrient elements which are balanced in a nutrient formula and furthest meet the growth requirement of crops are designed according to low strawberry reproduction coefficient and low multiplication rate, and the fertilizer is released slowly, has the effects of protecting soil, killing pests and adsorbing harmful substances in soil, is rich in nutrients and provides a good growth environment for growth and multiplication.