The invention discloses a medicinal liquid for promoting rice growth and improving rice disease resistance and relates to the technical field of rice planting. The medicinal liquid is prepared from the following components: fermented rape seed cake clear liquor, citrate, glutamine, trimethylglycine, a ginkgo extract, a plant flavone preparation, organic alcohol and water. By adopting the medicinalliquid disclosed by the invention, the rice harvesting time can be remarkably shortened, meanwhile, the empty seed rate and the immature grain rate of rice can be reduced, and furthermore, the yieldof the rice can be remarkably increased; due to adoption of the ginkgo extract, the empty seed rate and the immature grain rate of the rice can be remarkably reduced; due to adoption of the fermentedrape seed cake clear liquor, the empty seed rate and the immature grain rate of the rice can be reduced to a certain extent, the ginkgo extract and the fermented rape seed cake clear liquor have remarkable synergetic effects, rice growth can be promoted, and the quality of the rice can be improved.