Preparation has the CWS of the bacterium of some arabogalactans of a mycobactin part and exposure on surface, therefore when the CWS of prepared bacterium is used to prepare a kind of oil-in-water emulsion, a novel oil-in-water latex of the arabogalactan of the CWS with bacterium outstanding can be prepared and in the exposure of the surface of the oil particles of oil-in-water emulsion and a lyophilized preparation. The preparation of this lotion shows the superior immunostimulatory activity together with exceptional stability. As a result, the new immunotherapeutic agent that the preparation preparation of this lotion is used for cancer can be used.
