Multiple injuries are injuries to more than two sites, while at least one site is injured enough to be fatal, and are called multiple injuries. Therefore, the most common complications of multiple injuries, in addition to limb dysfunction, are also combined with injuries caused by internal organ damage. The most common complications are as follows: 1, infection: because of multiple parts of the injury, there are higher requirements for the patient’s physical rehabilitation, so after the injury these patients have reduced resistance, infection is a major complication; 2, the patient’s internal organ injury complications: for example, craniocerebral injury patients, after the injury, even if given in a timely manner a very formal standardized treatment, may eventually be left with language, limb functional impairment. Then there are organ injuries, for example, the patient’s spleen rupture, although the spleen removal or partial removal, save the patient’s life, but the patient because of the spleen removal, may lead to partial loss of function, such as reduced resistance to infection, resulting in these complications.