The invention discloses a cultivation method of pachira macrocarpa. The method comprises the following steps of land preparation, wherein a sandy loam land parcel which is deep, thick and fertile in soil, leeward and great in irrigation and drainage performance and faces the sun is selected and used as a planting field, land preparation is conducted, furrows are dug, and disinfection is conducted;sowing, wherein fresh pachira macrocarpa seeds with full grains are selected, soaked in water, cleaned, sowed in the planting field and watered, the temperature at the seeding stage is controlled, and pachira macrocarpa seedlings are obtained; transplantation, wherein disinfected nutrient soil is put into a planting pot, then the pachira macrocarpa seedlings are transplanted, and the pachira macrocarpa seedlings are sprayed with seed soaking liquid; pruning, wherein the pruning process comprises the steps of pinching, bud thinning, leaf picking, short pruning and shrinkage pruning. Accordingto the cultivation method of pachira macrocarpa, pachira macrocarpa is high in the seedling emergence rate and seedling strengthening rate, good in the growth condition and high in the stress resistance, pruning at the later period and recovering after pruning are conducted conveniently, and the ornamental effect and air purification effect of pachira macrocarpa are improved.