Abstract: The present invention relates to an inclination prevention structure of a child wheeled vehicle including a rotation shaft having one end extended through the bottom of the vehicle body and secured with one end of a swing arm which can be rotated with the rotation shaft. The other end of the swing arm has two sides respectively pivoted with a wheel, thereby forming a swing wheel set. An inclination prevention bracket mounted between the vehicle body and the swing arm has one end combined with the rotation shaft, and can swing with the swing arm synchronously. The inclination prevention bracket is extended toward a direction directed opposite to the wheel of the swing wheel set, is bent downward, and is formed with an abutting portion adjacent to the ground. In such a manner, the child wheeled vehicle can obtain a better support during turning around, thereby enhancing the safety of use.