Acupoint embedding therapy is a traditional Chinese external treatment method that, under the guidance of the theory of meridians and acupuncture in traditional Chinese medicine, implants absorbable thread bodies into specific acupoints and exerts therapeutic effects through continuous, gentle, long-lasting stimulation. In recent years, as the comprehensive treatment model for tumors has shifted from simply “prolonging survival” to “improving quality of life”, acupoint embedding, as an important part of integrated traditional Chinese and Western medicine treatment, has shown unique advantages in alleviating cancer pain, reducing adverse reactions of radiotherapy and chemotherapy, improving gastrointestinal function and regulating immune function. Based on relevant studies at home and abroad, this article reviews the mechanism of action, clinical application status and existing problems of acupoint embedding in adjuvant treatment of tumors, with the aim of providing references for clinical practice and in-depth research.