Objective To analyze the drug consumption of the joint logistics support force during field training in Yunnan, summarize the drug use characteristics of medical staff, and analyze the drug use rules, so as to provide the basis for modular drug support. Methods The basic information and drug use of the personnel in an institution of the joint logistics support force during the resident training period from April to June 2020 were collected and sorted out. The drug use indicators were calculated by using the defined daily dose (DDD) as the unit, including: daily drug dose (DDDs), daily drug dose cost (DDDc), drug use intensity (DUI), drug utilization rate (DUR) and drug ranking ratio (R) were used to describe drug use characteristics. Results During the resident training period, the amount of musculoskeletal system drugs was large, and the number of users was large. The dosage of cardiovascular system drugs, digestive system drugs and hormone drugs was large, but the number of users was small. Sensory organ drugs, dermatological drugs, heat-clearing agents (Chinese patent medicine) and respiratory system drugs were small in dosages, but the number of users was large. Ranked by DDDs, the top 3 drugs with the highest dosage were Yunnan Baiyao plaster, Yunnan Baiyao Band-Aid and Loratadine Tablets. Ranked by DDDc, the largest daily cost was Budesonide and Formoterol Fumarate Powder for Inhalation. As age increases, the intensity of drug use increased; The intensity of drug use in women was greater than that in men. The intensity of drug use was different for different categories personnel. Conclusion Musculoskeletal system drugs are important drugs for field training. The task personnel should formulate a list of medicines for basic diseases based on their own medication for basic diseases and the duration of the task, and submit it to the medicinal material guarantee department to ensure the carrying drugs. The factors affecting modular drug support in field training include: task type, region, solar term, duration and personnel composition, etc.