Injection has always been regarded as a sign of modern medicine or "western medicine". Many people think that injection is effective and fast. In fact, injection is the most uncivilized and unsafe way in treatment process. Safe injection refers to an injection that is harmless to the recipient, and the medical personnel performing the injection operation are not exposed to avoidable dangers, and the injection waste does not harm others. Unsafe injection has become a serious public health problem, and urgent measures are needed to deal with it.