<p>In the field of precision grinding processing, the shape accuracy of the grinding wheel and the condition of the abrasive directly determine the precision and production efficiency of the grinding task. The monitoring technology of grinding wheel wear is crucial for ensuring grinding accuracy and product quality. It can provide key basis for grinding wheel repair, replacement, and modification of the grinding path. Based on this, this paper systematically reviews the existing grinding wheel wear detection methods at home and abroad, summarizes the main research results of offline non-contact measurement, offline contact measurement, and online measurement technologies, and deeply analyzes the working principles, characteristics, and applications of each detection method. It points out the technical challenges such as insufficient detection accuracy and adaptability to complex working conditions. Among them, offline contact measurement uses the probe detection method to achieve nano-level ultra-high-resolution three-dimensional contour acquisition, offline non-contact measurement relies on laser point detection method and microscopic observation method to break through the interference of physical contact on the surface of the grinding wheel, and online measurement technology captures dynamic wear behaviors such as micro-cracking of grinding particles and binder failure through multiple types of sensors such as acoustic emission, photoelectric, and eddy current, without interrupting the grinding process. In addition, the paper also proposes possible solutions to overcome existing problems and discusses the intelligent development, multi-technology integration development direction and research focus of grinding wheel wear detection technology in the future, aiming to promote the progress of grinding wheel wear detection technology and better serve the field of precision grinding processing.</p>