Objective To analyze the effect of 3D reconstruction minimally invasive tooth extraction method on the limitation of mouth opening in patients undergoing impacted tooth extraction. Methods A total of 80 patients undergoing impacted tooth extraction who were treated in Suining Central Hospital from October 2023 to June 2024 were divided into the control group (n =40) and the study group (n =40) by the random number table method. The control group received hammer extraction, and the study group received 3D reconstruction minimally invasive tooth extraction. The operation-related indicators (impacted tooth localization time, operation time, window opening area, blood loss), pain, limitation of mouth opening, complication rate and patient satisfaction were compared between the two groups. Results The impacted tooth localization time, operation time, window opening area and blood loss in the study group were lower than those in the control group (P <0.05). The pain in the study group was lower than that in the control group (P <0.05). The limitation of mouth opening in the study group was milder than that in the control group (P <0.05). The incidence of complications in the study group (2.50%) was lower than that in the control group (20.00%) (P <0.05). The patient satisfaction in the study group (95.00%) was higher than that in the control group (77.50%) (P <0.05). Conclusion The application of 3D reconstruction minimally invasive tooth extraction method in impacted tooth extraction can effectively shorten the impacted tooth localization time and operation time, reduce the postoperative pain and limitation of mouth opening, which is conducive to lowering the incidence of complications and improving patient satisfaction with treatment.