Hylocereus undulatus pulp and preparation method thereof

The invention discloses hylocereus undulatus pulp and a preparation method thereof. The preparation method comprises the following steps of (1) performing pretreatment: choosing fresh hylocereus undulatus, and cleaning the chosen hylocereus undulatus; (2) performing pulping: conveying the cleaned hylocereus undulatus into a pulping machine, and performing pulping; (3) performing heating and degumming: heating pulp obtained through pulping in the step (2), removing foam floating upwards, and filtering off dregs; (4) performing blending and concentration: uniformly mixing white granulated sugar with xanthan gum to obtain a mixture, adding the mixture to materials obtained in the step (3) and having equal weight as the mixture, continuing stirring while adding the mixture to obtain a new mixture, then putting the new mixture into a steam explosion pot, wherein the pressure is 3.5MPa, maintaining the pressure of 3.5MPa for 3min, performing instantaneous release, heating the obtained materials, concentrating the h