The invention discloses a medical first-aid case which comprises a case body. Fixing strips are installed in an inner cavity of the case body. A supporting plate is installed between the two fixing strips. The upper end of the connecting plate is provided with a connecting block. The upper end of the connecting block is provided with a folding rod. One end of the folding rod is connected with theconnecting block. A shelf is installed at the upper end of the connecting block. The lower end of the supporting plate is provided with storage cells. The outer end of one storage cell is provided with a sliding door, and the outer end of the other storage cell is provided with a revolving door. A first storage cabinet is installed on one side of the case body and provided with three storage layers. A second storage cabinet is arranged at the outer end of one side of the case body. Three storage layers vertically installed and parallel to one another are arranged in an inner cavity of the second storage cabinet. A connecting ring is installed at the outer end of the case body. The medical first-aid case is simple in structure, the device body comprises three independent spaces in the innercavity of the case body and two independent spaces outside the case body, and the medical first-aid case is convenient and rapid to use when objects are taken for use.