Composition for tonifying spleen, eliminating dampness and losing weight as well as preparation method and application of composition

The invention discloses a composition for tonifying spleen, eliminating dampness and losing weight as well as a preparation method and application thereof, and belongs to the technical field of functional foods. The composition is prepared from the following components in parts by weight: 0.5 to 10 parts of fresh rhizoma phragmitis, 0.05 to 1 part of poria cocos, 2 to 10 parts of malt, 0.1 to 8 parts of semen armeniacae amarae, 0.05 to 1 part of semen coicis, 0.5 to 10 parts of herba lophatheri, 0.5 to 10 parts of semen myristicae, 0.05 to 5 parts of semen raphani, 0.05 to 5 parts of liquorice root and 0.05 to 5 parts of fructus lycii. The 11 raw materials of the composition have the effects of diffusing the lung and benefiting qi in the upper jiao, tonifying the spleen and appetizing in the middle jiao and promoting the diuresis in the lower jiao, and the medicines are compatible to remove damp evil in the upper jiao, the middle jiao and the lower jiao, strengthen the transportation of the spleen and the sto