Abstract： Objective： To observe the efficacy of acupoint application combined with intradermal needling in improving the quality of bowel preparation for colonoscopy in patients with constipation of qi deficiency type. Methods： A total of 66 patients with constipation of qi deficiency type who underwent colonoscopy in the Inpatient Department of the Affiliated Traditional Chinese Medicine Hospital of Guangzhou Medical University from January to November 2025 were enrolled. They were randomly divided into the observation group and the control group using the random number table method，with 33 cases in each group. Three cases dropped out from each group，resulting in a final total of 60 patients completing the clinical trial. The control group received a bowel preparation regimen of polyethylene glycol （PEG） electrolyte powder combined with simethicone alone， while the observation group received acupoint application combined with intradermal needling on the basis of the control group's regimen. The two groups were compared in terms of bowel cleansing score [Boston Bowel Preparation Scale （BBPS）]， intracolonic bubble grading score， polyp detection rate， adenoma detection rate， colonoscope insertion time， time to first defecation， time to successful bowel cleansing， frequency of defecation， adverse sensations， and patient acceptance of the same preparation protocol again. Results：After treatment，the scores for the right colon（ RC），transverse colon（ TC），left colon （LC），and total BBPS score in the observation group were superior to those in the control group （P＜0.05）. After treatment， the grading score of intracolonic bubble in the RC and TC segments as well as the grading score of total intracolonic bubble in the observation group were superior to those in the control group （P＜0.05）；while no statistically significant difference was found in the LC bubble grading score between the two groups （P＞0.05）. After treatment， there were no statistically significant differences between the two groups in polyp detection rate or adenoma detection rate （P＞0.05）. After treatment，the colonoscope insertion time，time to first defecation，and time to successful bowel cleansing in the observation group were shorter than those in the control group （P＜0.05）； while no statistically significant difference was found in the frequency of defecation between the two groups （P＞0.05）. During treatment，the grades of adverse reactions such as nausea，abdominal pain，and abdominal distension in the observation group were superior to those in the control group （P＜0.05）； while no statistically significant differences were observed in the grades of vomiting，poor sleep，fatigue，or dizziness between the two groups （P＞0.05）. After treatment，the patient acceptance of the same preparation protocol again was 86.67%（ 26/30） in the observation group and 63.33%（ 19/30） in the control group，with a statistically significant difference between the two groups （P＜0.05）. No allergies，flushing， rash， exudation， fainting during acupuncture， or needle sticking occurred at the acupoint application sites in the observation group. Conclusion： The bowel preparation regimen of acupoint application combined with intradermal needling can improve intestinal cleanliness in patients with constipation of qi deficiency type，reduce the colonoscope insertion time， shorten the duration to achieve successful bowel cleansing， decreased the incidence of adverse reactions， and improve patient acceptance of the same preparation protocol again.