Abstract:“It is unfortunate for gastric cancer patients to get sick, but it is fortunate if they can receive reasonable and standardized treatment.” Surgery, as the core strategy in the treatment of gastric cancer, is the main approach to achieving reasonable and standardized treatment for the disease. Tracer technology, as a term originating from the field of chemistry, has been widely used in the field of gastric cancer surgery, which has brought many conveniences in the localization of gastric lesions and resection range, lymph node dissection and surgical quality control, sentinel lymph node biopsy and the implementation of function preserving surgery, and blood supply judgment, providing an effective guarantee for standardized and homogeneous radical gastrectomy. This article introduces the development status and main applications of tracer technologies in gastric cancer, including the latest tracer strategies, such as the dual tracer technology proposed by the author, and offers an initial discussion of the existing uncertainties in this field and future development directions, with the aim of helping to achieve a rational and standardized surgical treatment approach for gastric cancer patients in the future.