The invention discloses a cultivation substrate beneficial to growth of jonquil, which comprises laterite, coconut bran and perlite, wherein the volume ratio of the coconut bran to the perlite to thelaterite is 4: 2: 0-4 after pre-treatment of each substrate component; and topdressing of the substrate begins on the 30th day after planting, and the topdressing is carried out once every 20 days. Meanwhile, the invention also provides a cultivation method beneficial to the growth of the jonquil, which comprises the following steps: substrate filling, cuttage, seedling stage management and finished stage management. The cultivation substrate has the advantages that raw materials are simple and easy to obtain, and abundant organic matters, nitrogen, phosphorus, potassium and trace elements canbe provided for the growth of the jonquil, so that the growth conditions of the jonquil in a branch growth period, a squaring period and a flowering period are obviously improved; in a cultivation process, reasonable temperature and humidity are controlled; and meanwhile, special seedling cultivation is not needed, cuttings are directly inserted into a flowerpot to achieve one-time flower formation, the growth period is shortened, and the production cost is reduced.