The present application is suitable for the technical field of
plant extraction and separation, and provides a
polysaccharide compound with clear molecular structure, which is suitable for treating patients with
advanced cancer (surgical conditions have been lost, survival time is only three to six months, and
chemotherapy conditions are still available), comprising: S1,
drying and crushing
Ganoderma lucidum; S2, mixing with water in a sealed container to extract effective components under high temperature and
high pressure; S3, removing residues from the concentrated liquid with effective components; and S4, preparing the residue-removed concentrated liquid into a certain concentration to obtain
polysaccharide with effective components through
column chromatography. The
polysaccharide with effective components has good water-soluble performance, is easy to be absorbed by the
human body, has antitumor
efficacy, and has
efficacy in preventing the occurrence of tumors in humans, especially when used in combination with
chemotherapy drugs, the toxic and side effects of the
chemotherapy drugs on the
human body can be eliminated, and the control, reduction, and
elimination of
tumor cells are all supported by corresponding experimental data.