The invention discloses protection trousers for a patient after circumcision, which comprise a trousers body, two trousers legs are integrally arranged at the bottom of the trousers body, and a protective unit is arranged at the joint of the front portion of the trousers body and the two trousers legs. The protective unit comprises a clamping base and a shell body integrally connected with the clamping base, the shell body is a conical shell body of which both ends are of open structures, the caliber of the port in one end of the shell body, away from the clamping base, is smaller than the caliber of the port in the end of the shell body, connected with the clamping base, and four lugs are integrally and symmetrically arranged on the outer portion of the shell body, close to the clamping base. The protection trousers are used for protecting the genital area of the patient after circumcision, can effectively prevent the genital area of the patient from making contact with the trousers body and prevent wounds after circumcision from being scratched due to the contact between the genital area of the patient and the trousers body, are beneficial to wound healing, and meanwhile can effectively reduce the probability of wound infection of the patient, thereby being beneficial to quick recovery of the patient.