A Method and device for abnormal drug reimbursement information are provided, wherein the method comprises: obtaining a drug insurance settlement request for a target drug, The drug insurance premiumsettlement request includes the identity information of the user in the preset state, the reimbursement information corresponding to the target drug, and the weight information and height informationof the user in the preset state. Determining The insured amount and the accumulated reimbursement amount of the user in the preset state in the reimbursement period of the target drug according to theidentity information and the reimbursement information. Determining The single dose according to the weight information, height information and dosage rules. According to the insured amount and the drug benefit rule, determining the reimbursement threshold and the reimbursement time limit corresponding to the target drug, wherein the reimbursement threshold is greater than or equal to the insuredamount; If the insurance premium settlement request meets the reimbursement time limit and the cumulative reimbursement premium is greater than the reimbursement threshold, determining that the drugpremium settlement request is abnormal, and sending an abnormal reimbursement prompt. The technical proposal of the invention can reduce the fraudulent insurance behavior.