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From April to June, the dried Chemicalbook skins of the trees that have been growing for more than 15 years are peeled and gently boiled in boiling water, then piled into a pit and covered with grass to make them sweat. When the water seeps out from the inside and the inner surface becomes purplish brown or brown, they are steamed soft, taken out, rolled into a tube and dried in the sun or on the bed. Root and branch skin can be dried directly after peeling. Figure 2 shows magnolia officinalis. Extraction methods 1. The production process of magnolia officinalis extract (flow extract). The magnolia officinalis was crushed, soaked with ethanol for 12 hours, placed in the percolating cylinder, percolated with about 12 times the amount of ethanol, collected the percolating liquid, and recovered the ethanol to the end of the flow extract. The yield was about 9%, the solid content was 85.0%, the magnolol content was more than 11.0%, and the magnolol content was more than 5.0%. 2. Extraction and separation of magnolol and magnolol Extract magnolia officinalis dry bark coarse powder, add 1/5 amount (W/W) of quick lime powder, mix well, percolate with 15-20 times the amount of distilled water, add hydrochloric acid to adjust the pH value to 2-3, and let it stand. The precipitates were collected and washed with distilled water until the pH value of the precipitates was 6 ~ 7. After drying, alumina (1:10) was added to mix evenly and placed in an extractor for extraction with cycloethane. The cycloethane extract was concentrated and cooled, white crystals were precipitated, and then crystals and mother liquid were filtered. The crystallization was recrystallized with cyclohexane and was honokiol. The mother liquor was concentrated and crystallized, then recrystallized cyclohexane, and the colorless flake crystallization was obtained, that is, magnolol crystallization. The yield of magnolol was 85%, and that of magnolol was 74%.