Blood pressure monitor is an important tool used in biology teaching to measure and demonstrate changes in human blood pressure. It usually includes an inflatable cuff, pressure gauge or digital display, and stethoscope. The blood pressure monitor compresses the artery with an inflatable cuff to prevent blood flow, and then slowly deflates to measure the pressure exerted by the blood on the vessel wall. In biology teaching, blood pressure monitors can help students understand the working principle of the circulatory system, learn how to measure blood pressure correctly, and understand the factors that affect blood pressure. Blood pressure monitor is a very practical teaching tool in biological experiment teaching, which helps cultivate students' practical ability and scientific exploration spirit.