Abstract:Objective:To investigate and analyze the diagnostic value of Narrow Band Imaging (NBI) technology in the diagnosis of laryngopharyngeal reflux disease (LPRD) in children. Methods:Forty pediatric patients aged 3–14 years who were diagnosed with hypenrophy of tonsily and/or adenoid hypertrophy and visited the Department of Otolaryngology at Chongqing Traditional Chinese Medicine Hospital between May and November 2025 were enrolled.They underwent salivary pepsin testing and white-light/NBI laryngoscopy.There are two otolaryngologists completed the Reflux Findings Score (RFS) questionnaire. Results:27 patients tested positive for salivary pepsin of 40 patients; under white light, 13 patients had an RFS >7 (32.5%)and 27 had an RFS ≤7(67.5%); under NBI mode, 25 patients had an RFS >7 (62.5%)and 15 had an RFS≤7(37.5%). There was a statistically significant difference between the two modes (P < 0.05). The differences in scores between the white light and NBI modes for “erythema/hyperemia” “vocal cord edema” and “diffuse edema” were statistically significant (P=0.001). Under NBI, brown/red spots in the interarytenoid region were observed in 11/40 (27.5%) cases, inflammation of the lingual fossa was observed in 31/40 (77.5%) cases, and the cobblestone sign on the posterior pharyngeal wall was observed in 37/40 (92.5%) cases. There was no significant correlation between the grading of the posterior pharyngeal wall “pebble-like” sign and the degree of adenoid hypertrophy (P=0.400). Conclusion:NBI facilitates the identification of certain reflux signs more effectively than conventional white light, thereby improving the diagnostic accuracy of LPRD in children.