The invention relates to an extraction method of
flammulina velutipes sporocarp
dietary fiber, which comprises the following steps of: cleaning
flammulina velutipes sporocarp, performing leaching with
ethanol, airing residues, performing leaching with a 2-8%
sodium hydroxide solution at 60-80 DEG C, performing filtering, washing the filter residues to be neutral, and performing
drying to obtain the
flammulina velutipes sporocarp
dietary fiber. According to the invention, a rat
obesity model is established by using a high-fat feed; the weight, the Lee's index, the BMI and the
visceral organ index of a rat are measured; and
pathological changes of adipose tissues and livers of the rat are observed through an HE
staining method. The weight reduction effect of the flammulina velutipes sporocarp
dietary fiber is comprehensively evaluated through the detection indexes. Experimental results prove that the flammulina velutipes sporocarp dietary
fiber can effectively reduce the weight, the Lee's index, the BMI and the
visceral organ index of the rat and relieve
visceral organ injury caused by modeling, and has no toxic or
side effect, so that the flammulina velutipes sporocarp dietary
fiber disclosed by the invention can be used for preparing health care products or drugs for treating / preventing
obesity.