The multifunctional retractable smoking electric knife pen is a surgical tool used to remove tissue, stop bleeding and simultaneously suck smoke and ooze blood during surgery. The breakthrough of structure and the innovation of interaction mode are the main features of this smoking pen compared with other competitors. The smoking pen can effectively ensure that the doctor can obtain a clearer observation field during the operation, and at the same time bring a more convenient and flexible hand use experience, and ultimately achieve the purpose of ensuring the safety of the operation and improving the quality of the operation.