NOVELTY - Continuously preparing pumpkin protein, ethanol fuel and dietary fiber, involves extracting waste pumpkin pulp, centrifuging and filtering the solution, centrifuging the filtrate to obtain precipitate and supernatant, freeze-drying the precipitate to obtain protein, performing concentration and ethanol precipitation of the supernatant to obtain water-soluble dietary fiber, centrifuging the residue to obtain precipitate and supernatant, freeze-drying the precipitate to obtain water-insoluble dietary fiber, and fermenting the supernatant to obtain fuel ethanol.    USE - The method is useful for continuously preparing pumpkin protein, ethanol fuel and water-soluble and water-insoluble dietary fiber (claimed).    ADVANTAGE - The method is simple and low in cost, has high product yield as there is no mutual interference of various steps, and is suitable for industrial production.    DETAILED DESCRIPTION - Method for continuously preparing pumpkin protein, ethanol fuel and dietary fiber involves (a) washing waste pumpkin pulp, peeling and drying the pulp, crushing the waste pulp with 1-5% sodium hydroxide solution, where the liquid ratio is 20:1-30:1, extracting the pulp at 60-80 degrees C for 50-70 minutes, oscillating the pumpkin pulverized material solution at constant temperature, centrifuging the solution, and filtering the solution to obtain a filtrate and a filter residue, (b) regulating pH value of the filtrate to protein isoelectric point using a buffer solution, and carrying out centrifugal separation of the solution to obtain a precipitate and a supernatant, (c) washing the precipitate and freeze-drying the precipitate to obtain the pumpkin protein, and performing concentration and ethanol precipitation of the supernatant to obtain water-soluble dietary fiber, (d) washing the pumpkin filter residue with water, adding water, subjecting the solution to liquefaction and saccharification using alpha -amylase, carrying out centrifugal separation of the processed solution to obtain a precipitate and a supernatant, washing the precipitate with water, and freeze-drying the precipitate to obtain the water-insoluble dietary fiber, (e) fermenting the supernatant using active dry yeast, filtering the fermented solution, distilling the filtrate, and dehydrating using a desiccant to obtain fuel ethanol.