The invention belongs to the field of planting methods, and particularly relates to a method for cultivating chestnut-flavor pumpkins in a plastic greenhouse. The method is characterized by comprisingthe following steps in sequence: S1, variety selection; S2, seedbed selection; S3, nutrient soil preparation, wherein a sieved decomposed organic fertilizer is added into sieved fine soil to preparethe nutrient soil, after fertilizing and sterilizing, soil is loaded in a nutrition bowl, the nutrition bowl is placed in a seedbed or a 50-hole well seedling culture tray for later use, and mud on acover is screened for later use; S4, seed treatment; S5, seed sowing; S6, seedling management; and S7, preparation before field planting and field planting, specifically, S71, field selection, S72, ploughing and base fertilizer applying, S73, soil preparation and bedding, wherein covering of a greenhouse film is carried out 10-15 days before planting, 50kg of ternary compound fertilizer is appliedper mu according to the positions of planting rows, and soil preparation and bedding are carried out, and planting can be ready when the ground temperature is stabilized at 15 DEG C or above, and S74, field planting and field planting density determination. By the method, the chestnut-flavor pumpkins have the advantages of being earlymatured, good in growth vigor, strong in disease resistance andhigh in survival rate.