How long it takes to remove the cast depends on the specific degree and location of the bone fracture, the specific analysis is as follows:1. If there is no obvious misalignment of the long bones of the limbs, it usually takes about 4 weeks to remove the cast. However, if the fracture is more serious and the local soft tissue damage is more serious, it will affect the blood circulation of the fractured area and the recovery of the fracture, and it may take about 4-6 weeks to remove the cast.2. Special parts of the fracture, due to the poor blood circulation, the recovery will be slower, for example, the carpal navicular fracture, which needs to be determined according to the review film, and it will take about half a year for some of the patients to remove the cast. There are other factors that can affect the time of removing the cast, the patient’s age is relatively young, the recovery ability is strong, the time of removing the cast will be relatively shortened. If the patient is older, has more underlying diseases, poor nutritional status, and poor recovery ability, the time for removing the cast will be relatively longer, and the specifics need to be determined by radiographs.