Bone puncture, or bone marrow puncture, is generally available at the anterior superior iliac spine, posterior superior iliac spine, sternal stalk, and lumbar spinous process. The most commonly used puncture sites are the anterior superior iliac spine and the posterior superior iliac spine. The anterior superior iliac spine is the most prominent bony part of the anterior lumbar region, and the posterior superior iliac spine is the bony prominence above the buttocks, which is usually the part where the waistband of the pants is tied. The anterior superior iliac spine is usually chosen as the puncture point 1-2 cm above the posterior superior iliac spine, where the bone surface is flat, easy to fix and easy and safe to operate. The same is true for the posterior superior iliac spine. The sternal stalk is used as the puncture site when the above two sites fail to puncture or the amount of bone marrow is not satisfactory, but the bone here is thin, and there are heart and large blood vessels behind it, so the risk of puncture is higher. The lumbar spinous process is chosen because it is more prominent, but it is rarely used.