The invention belongs to the field of foods, and particularly relates to a protein and probiotic composite food with the weight losing effect. The protein and probiotic composite food adopts probiotic and protein as main raw materials and is prepared by adding dietary fiber, prebiotics, auxiliary functional factors, vitamins and mineral substances. The protein and probiotic composite food with the weight losing effect contains the probiotic and can change intestinal flora, increase the number of beneficial bacteria, decrease the number of harmful bacteria and decrease the inflammatory reaction, and therefore the probiotic role on a host is achieved; the composition of enteric microorganisms can be adjusted, and therefore the obesity symptoms can be improved. According to the protein and probiotic composite food, the food not only can rapidly and conveniently provide various nutrients for the human body, but also has the advantages of being high in fiber, low in heat, likely to generate satiety and the like and is an ideal and healthy weight losing helper, the body weight is controlled on the basis of balanced nutrients, the healthy weight losing purpose is achieved, obesity complications are prevented, and therefore the food can be specially provided for the obesity.