The invention discloses a plant reconstituted sheet, a preparation method and an electric heating method. The plant reconstituted sheet is prepared by conducting papermaking on slurry, and the slurryis prepared by mixing, by weight, 3-5 parts of cellulose, 1-2 parts of natural rubber, 50-70 parts of dried plant leaves, 10-15 parts of a humectant, 8-12 parts of fibers and 2-5 parts of a food additive. The slurry is prepared from the cellulose, the natural rubber, the dried plant leaves, the humectant, the fibers and the food additive, and then the plant reconstituted sheet is prepared from theslurry by papermaking. The plant reconstituted sheet is separated from tobacco materials and can be used for absorbing atomized gas generated by an electronic cigarette liquid, a smoking effect withsaturate gas amount is achieved on the atomized gas, and at the same time, few heating non-combustion harmful substances are generated; moreover, the food additive and the like which are useful for the human body are added and can produce gas which has fragrant components and a health care effect on the human body, a better experience can be brought, and physiological demands can be met.