The invention discloses a stable carbohydrate composition water solution as well as a preparation method and application thereof. The composition water solution is prepared from 3 to 5 (w/v) percent of pectin, 5 to 30(w/v) percent of carbohydrate and 0.05 to 2.0(w/v) percent of stabilizing agents. The pectin, the carbohydrate and the stabilizing agents are premixed; then, mixed powder is added into 85 DEG C water; uniform stirring, sterilization and filling are performed; the composition water solution is obtained. Without calcium reduction treatment, the carbohydrate composition water solution can be enabled to have high stability; the process is simple; the industrialization is easy. Through the carbohydrate water solution, untoward symptoms such as backflow, abdominal distension and diarrhea of clinical patients can be relieved; certain repair and protection effects are achieved on the gastrointestinal tract function of a patient; the lift quality and level of the patient are wholeimproved.