The invention relates to the field of bicycles, in particular to a bicycle enabling a user to conveniently go up and down stairs. The bicycle comprises a bicycle body, a rolling wheel set and a fixed frame. The rolling wheel set comprises at least two rolling wheels and a caterpillar band, wherein the caterpillar band is installed on the two rolling wheels; the fixed frame comprises two vertical supporting plates and a pair of horizontal supporting plates, wherein the horizontal supporting plates are fixedly installed on the side faces of the two rolling wheels respectively so that the two rolling wheels can arranged in the mode that one of the rolling wheel is arranged in front of the other rolling wheel, and the axes of the rolling wheels are parallel to each other, one end of each vertical supporting plate is fixedly connected with the bicycle body, the other end of each vertical supporting plate is fixedly connected with the horizontal supporting plates, each vertical supporting plate is composed of two vertical plate bodies, each vertical plate body comprises an upper plate body and a lower plate body, a sliding hole is formed in the lower end of each upper plate body, a nut is arranged at the upper end of each lower plate body, and each nut penetrates through the corresponding sliding hole, and can be fixed to any position of the corresponding sliding hole. According to the bicycle, the user does not need to carry the bicycle with the hands or on the shoulder when going up and down the stairs, the user can conveniently climb the stairs, and labor is saved.