Rhabdomyosarcoma mainly manifests as a subcutaneous mass, and the main danger is the occurrence of malignant changes, invasion of vital organs and life-threatening. Rhabdomyosarcoma, also known as myofibroma, is a kind of fibrous tissue tumor originated from muscle, tendon membrane, fascia and rich in collagen, which is mostly benign tumors, mainly manifested as subcutaneous mass, with slow growth, generally small, but with clear edge, smooth surface, hard texture, and no adhesion with the skin, and also with a certain degree of mobility. It has the possibility of malignant transformation, especially the hard fibrous tumor in the muscle of abdominal wall, which should be completely resected by surgery as early as possible, but it can recur many times, which leads to a wider range of lesions, and there is an unstoppable growth, and ultimately, it can be life-threatening due to the invasion of vital organs.