AimThis study aims to examine the features of online pediatric pharmacy consultations in Southwest China, an area with limited medical resources during the post-epidemic era and to explore the factors affecting the dialogue volume in online consultations. MethodsA cross-sectional study was conducted in southwest China from April 2022 to March 2023. The study encompassed a cohort of 2,526 children, ranging from 0 to 18 years old. The collected data encompassed patient gender, age, weight, department, drugs involved in consultation services, types of questions consulted, consultation start time, and the dialogue volume in online consultations. Descriptive statistics and an ordered multicategorical logistic regression analysis were performed. SPSS 26.0 software was used for data analysis. ResultsAmong the total Internet pharmacy consultation services offered, the infant group constituted the largest portion (n = 1021). Children with internal medicine concerns have greater online consultation needs (n = 455). The peak usage of Internet pharmacy consultation occurred in the fall at 11:00 a.m. (n = 73). Factors influencing the dialogue volume in online consultations include the non-availability of Chinese medications [P = 0.033, OR = 0.81, 95 % CI (0.67–0.98)], consultation initiation during the spring [P = 0.002, OR = 1.52, 95 % CI(1.17–1.97)] or afternoon [P = 0.012, OR = 1.36, 95 % CI (1.07–1.72)] and weight<15 kg group [P = 0.038, OR = 2.19, 95 % CI (1.04–4.58)]. ConclusionOur findings provide important information for peers to carry out their work. In the post-epidemic era, emphasis should be placed on addressing concerns related to children's internal medicine and otolaryngology. Optimizing healthcare resource allocation should take into account the time-seasonal variability of children's consultation behaviors. Furthermore, it is recommended to focus on weight<15 kg children in inquiries, absorb sufficient knowledge about Chinese medicines, and schedule more pharmacists to participate in consultation services during the spring or in every afternoon. These findings help the authorities of online platforms and the National Health Commission to rationalize the allocation of healthcare resources, optimize the quality of service delivery, and develop new policies.