The invention relates to a kind of compound collagen gel, which is the mixture of collagen and antibiotics. For every gram gel, there is 1-100mg collagen, which is extracted from tendon of the rat tails, swine, or ox, 1-100mg antibiotics, 0.1-1.0mg medical antiseptics, 10-500mg thickening agents, and water. The antibiotics and collagen act cooperatively to be used in the treatment of the following diseases: different kinds of open wound, anabrosis caused by diabetes, skin damage because of venereal disease, hyperkeratesis, cuticularized skin problems such as keratosis palmaris ET plantaris, winter cutitis and ichthyosis. Since the collagen protein in the gel can be easily absorbed to provide threpsis to the diseased region, so it can promote the agglutination very effectively as well as extend the time of releasing time of the antibiotics.