The utility model relates to a backpack with a ventilation support, and belongs to the field of backpacks. The backpack with the ventilation support comprises a backpack body and straps. One face close to the back of a human body is a backpack body back face. The backpack further comprises mesh cloth adaptive to the backpack body back face in shape, meshes are formed in the surface of the mesh cloth, the upper end and the lower end of the mesh cloth are fixed to the backpack back face, and the part between the upper end and the lower end of the mesh cloth is a movable area separated from the backpack back face. In addition, the backpack comprises the ventilation support which is arranged in the movable area, and the upper end and the lower end of the ventilation support abut against joints between the upper end and the lower end of the mesh cloth and the backpack back face respectively. By the adoption of the scheme, the movable area is formed between the mesh cloth and the backpack back face to allow air to circulate, the meshes are formed in the mesh cloth, heat on the back of the human body is dissipated into air through the meshes in the mesh cloth in the process that the backpack is carried on the back of a user through the straps, and comfort of the back can be maintained.