Objective To explore the effects of multifunctional butterfly-shaped chassis ostomy bag for faeces drainage in incontinence-associated dermatitis (IAD) . Methods From January to September 2019, this study selected 84 fecal incontinence patients with IAD of Intensive Care Unit in Zhejiang Provincial People's Hospital by convenient sampling. All of patients were divided into observation group (n=42) and control group (n=42) with the method of random number table. Control group carried out the IAD skin management trilogy combined with the common ostomy bag, while observation group implemented the IAD skin management trilogy combined with the multifunctional butterfly-shaped chassis ostomy bag. We compared the overall effective rate of treatment for IAD, nursing time of nurses for IAD, average retention time, average use time and replacement frequency of ostomy bag, family members satisfaction of patients between two groups. Results The overall effective rate of treatment for IAD in observation group was 95.24% (40/42) higher than that 73.81% (31/42) in control group with a statistical difference (P<0.05) . The nursing time and retention time of observation group was (1.89±0.32) h/d and (5.2±0.4) days per person respectively shorter than those [ (5.73±1.64) h/d and (9.4±1.2) days per person] of control group with statistical differences (P<0.05) . The use time of observation group was (98.27±12.18) hours per bag longer than that (72.18±4.63) hours per bag of control group with a statistical difference (P<0.05) . The replacement frequency of observation group was (1.20±0.10) times per person also statistically less than that [ (3.10±0.70) times per person] of control group (P<0.05) . Family members satisfaction of observation group was significantly higher than that of control group (P<0.05) . Conclusions Compared with traditional ostomy bag, the multifunctional butterfly-shaped chassis ostomy bag has effective treatments for IAD can shorten the nursing time for IAD, lengthen the use time of ostomy bag, reduce the average retention time and replacement frequency and improve family members satisfaction which can be widely used in clinical application. Key words: Butterfly-shaped; Ostomy bag; Incontinence- associated dermatitis