Objectives This study explores how nasal structure and mucosal contractility in CRSsNP patients relate to and potentially affect their olfactory function.. Design and Setting The subjective olfactory function of the patients was assessed using the Sniffin’ Stick test. Patients with an olfactory total score of ≤27 were classified into the olfactory disorder group, while those with an olfactory total score of >27 were classified into the normal olfactory function group. Participants Patients diagnosed with Chronic Rhinosinusitis without Nasal Polyps (CRSsNP) at our hospital’s Department of Otorhinolaryngology-Head and Neck Surgery. Main outcome measures Acoustic Rhinometry (AR) was employed to assess the patients’ nasal cavity structure and nasal mucosal contractility. Results No significant differences were found in gender, age, smoking history, and nasal function indicators between the normal olfaction and olfactory disorder groups (P > 0.05). After controlling for age, olfaction was negatively correlated with nasal mucosal contractility (ΔNV2-5). In the normal olfaction group, olfactory threshold was positively correlated with ΔNV2-5 (P < 0.01), while no significant correlation was observed in the olfactory disorder group. Multiple linear regression analysis revealed that age and NV2-5 were negatively correlated with total olfactory score. Conclusions The reduction of olfaction in CRSsNP patients does not affect the contractility and relaxation functions of the nasal mucosa.As the nasal cavity volume increases, the sensitivity of olfaction in CRSsNP patients actually decreases.The relative stability of the nasal mucosa in CRSsNP patients allows their olfactory cognitive ability to reach its optimal state.