Universal wheel and moving device

The utility model provides a universal wheel and a moving device. The universal wheel comprises a supporting bracket, a main wheel and an auxiliary wheel, wherein the main wheel is rotationally connected with the supporting bracket, and the main wheel has a first limit passing height. The auxiliary wheel is rotationally connected with the supporting bracket, the auxiliary wheel is provided with a second limit passing height and a first height line corresponding to the second limit passing height, the front side of the auxiliary wheel is arranged in front of the front side of the main wheel in the advancing direction of the main wheel, and the bottom of the auxiliary wheel is arranged above the bottom of the main wheel. According to the universal wheel and the moving device, the main wheel and the auxiliary wheel which are rotationally connected are arranged on the supporting bracket, so that the universal wheel can pass through a higher step under the condition that the radius and the driving force of the uni