The invention relates to a protein dietary fiber meal replacement powder solid beverage and applications thereof, and belongs to the field of foods. The protein dietary fiber meal replacement powder solid beverage comprises the following raw materials: 20-25 parts by weight of whey protein, 20-25 parts by weight of oat fiber, 15-25 parts by weight of soy protein isolate, 15-20 parts by weight of resistant dextrin, 10-15 parts by weight of the psyllium husks, 2-5 parts by weight of milk minerals and 2-5 parts by weight of inulin. The above-mentioned protein dietary fiber meal replacement powdersolid beverage is convenient to eat, full and rich in mouth feel and rich in nutrients, can effectively supplement proteins and minerals, and can reduce hunger, effectively reduce appetite and reduceenergy intake so as to achieve weight-losing effect. When used for people who are losing weight, the above-mentioned protein dietary fiber meal replacement powder solid beverage can effectively control the weight of the drinker by providing satiety, and can effectively avoid affecting the health of the drinker.