Objective:To investigate the effect of applying narrative therapy theory into game on improving the quality of bowel preparation in children, and to provide a basis for selecting nursing intervention methods before bowel preparation.Methods:This study was a quasi experimental study. Totally 62 children who took polyethylene glycol electrolyte dispersion for bowel preparation in Gansu Maternal and Child Health Hospital from January to December 2021 were included in this retrospective study. They were divided into control group with 28 cases and experimental group with 34 cases according to random number table method. The control group was given conventional bowel preparation and medication guidance, and the experimental group was given the intervention during bowel preparation by applying narrative therapy theory implanted games. The bowel preparation adequacy rate, complete medication taking rate and parental satisfaction of the two groups were observed and compared.Results:The bowel preparation adequacy rate and complete medication taking rate in the experimental group were 94.12% (32/34) and 52.94% (18/34), respectively, which were higher than 46.43% (13/28) and 10.71% (3/28) in the control group, and the differences were statistically significant ( χ2 = 15.23, 10.41, both P<0.01). According to the average BBPS score, the experimental group had better intestinal cleanliness compared to the control group (7.65 ± 1.07 vs 6.07 ± 1.41, t = -4.87, P<0.01), the difference was statistically significant. 97.06% (33/34) of the parents in the experimental group expressed satisfaction, which was higher than 64.29% (18/28) in the control group, and the difference was statistically significant ( χ2 = 12.74, P<0.05). Conclusions:By applying the narrative therapy theory implanted games, the complete taking of high-dose bowel cleasing agent can be promoted and the quality of bowel preparation can be improved, which is worth suggesting as a nursing intervention method for bowel preparation.