The invention relates to a fruit and vegetable fiber chewable tablet with defaecation and health care functions and a preparation method of the fruit and vegetable fiber chewable tablet. A product of the fruit and vegetable fiber chewable tablet is prepared from inulin, soluble dietary fiber, oat fiber, isomalt, carrot freeze dry powder, celery freeze dry powder and magnesium stearate as raw materials according to a certain mixture ratio through steps of sieving, mixing, tabletting, internal packing and the like, and has good defaecation and health care functions. The dosage form of the fruit and vegetable fiber chewable tablet adopts the chewable tablet, the taking is convenient, the release of the effective ingredients is fast, the absorption is favorably realized, the carrying, the storage and the conveyance are convenient, the preparation method of the fruit and vegetable fiber chewable tablet is simple, the production is mechanized, the automation degree is high, the yield is high, and the cost is low.