Sea cucumber saponin, preparation method thereof and application thereof in food or medicine

The invention discloses a sea cucumber saponin, a preparation method thereof and the application thereof in food or medicines. A sea cucumber saponin mixture comprises multiple sea cucumber alkyl-type triterpenoid saponins. Preferentially, the sea cucumber saponin mixture comprises holothurin A and/or echinoside A. The sea cucumber saponin mixture can also comprise one or more in holothurin A, holothurin B, echinoside A, echinoside B, 24-dehydroechinoside A and stichoposide E. The sea cucumber saponin can be applied to preparing weight-losing food or medicines, and animal experimental resultsshow that the sea cucumber saponin can be used for remarkably inhibiting weight increment and reducing internal fat accumulation so as to realize a good weight-losing effect. The preparation method of the sea cucumber saponin is low in cost, simpler in steps and less in the pollution of organic solvents on the environment; and through animal experiments, the prepared sea cucumber saponin is proved to have a good weight-losing effect so as to be used for developing safe and effective weight-losing food or medicines.