Morchella polysaccharide nano-selenium as well as preparation method and application thereof

The invention discloses morchella polysaccharide nano-selenium and a preparation method and application thereof.The preparation method comprises the steps that a morchella polysaccharide solution, a Na2SeO3 solution and a VC solution with preset concentrations are added into a reaction container to be mixed, magnetic stirring is conducted for sufficient reaction, and the morchella polysaccharide nano-selenium is prepared; the mass concentration ratio of the morchella polysaccharide solution to the Na2SeO3 solution to the VC solution in the morchella polysaccharide solution to the Na2SeO3 solution to the VC solution in the preset concentration is 1: 1: (2-3). Besides, the morchella polysaccharide nano-selenium provided by the invention is prepared according to the preparation method, is a spherical amorphous body with the particle size of 70-75nm, has the selenium element content of 60-65%, has a remarkable inhibition effect on liver cancer cells and cervical cancer cells, has the cancer cell apoptosis inducti