The invention provides a cultivation method capable of improving root activity of coffees and relates to the technical field of coffee planting. The cultivation method capable of improving the root activity of the coffees comprises the steps: S1. planting
sesbania for 1 year in advance, carrying out planting and harvesting, and then, returning the other parts to fields; S2. applying
humus soil 1 and tea
brick rosin wash for disinsectization, adjusting a pH value, and meanwhile, carrying out plowing, harrowing and fining; S3. planting the
sesbania at intervals; S4. applying
humus soil 2, and carrying out plowing, harrowing and fining; and S5. carrying out
transplanting and reasonable watering. Through using the
humus soil 1, the humus soil 2, the
sesbania and shade trees, soil for plantingthe coffees is rich in
fertility; the sesbania and the shade trees have certain economic values, and a pH of a planting field is proper under the action of
lime and
plant ash in the humus soil 1 and the humus soil 2; the tea
brick rosin wash and fosthiazate in watering water can effectively control
insect pests threatening roots of the coffees; and due to different planting time and different watering
modes and containing ingredients, the requirements on survival and growth of the roots can be fully met, and the
survival rate after
transplanting of young coffee plants is guaranteed.