Component capable of adjusting size of shoe and shoe thereof

The utility model discloses a component capable of adjusting size of shoe and the shoe thereof. The component is detachable at the front end of a settable shoe. The shoe comprises more than one detachable component which can be set to the front end of the shoe chamber. In the wearing process of the adjustable shoe according to the utility model by the child, when a thickening pad with larger thickness can not be adapted for the two feet, the thickening pad can be taken out and a thickening pad with a small thickness can be used thus the shoe can be reused without buying new shoes. Each pair of shoe can be worn for one year or even two years. The wastage of resource can be prevented greatly. The unnecessary expenditure can be reduced for reducing the burden of family. The component and the shoe of the utility model are suitable for the using of young people in growth.