Objective: To collect data at a local eye hospital in northeast China to assess the strabismus types and numbers among hospitalized patients of all ages. Methods: A retrospective analysis was performed on patients diagnosed with strabismus in the ophthalmic hospital of the First Affiliated Hospital of Harbin Medical University from January 2014 to December 2017. The collected data included basic patient information, type of strabismus, and the prevalence of various types of strabismus. The distribution of the types of strabismus and the variation in the trends of strabismus in patients were observed and analyzed. The distribution and number of strabismic patients were evaluated by a cross-group comparative analysis of variance, Chi-square test and Fisher's exact test. Results: Among 3 555 strabismus patients aged 1-79 years (15.5±11.6 years) during these four years, 3 536 patients had strabismus surgery; the number of patients increased year by year and peaked in the months of January, February, July and August (χ2 =956.67, P<0.001). Meanwhile, the amount of exotropia surgery performed (71.8%) was significantly higher than that for esotropia (16.0%, χ2 =31.41, P<0.001), and intermittent exotropia was the most common type of strabismus. Non-accommodative esotropia (77.6%) was the most common type of strabismus in all patients with esotropia. Although the number of special types of strabismus patients was small, there was still a small upward trend during the four years. Among patients of all ages, patients under the age of 12 years were the most common, accounting for 56.0% of the total. Of these, exotropia (71.5%) was the most prominent type of strabismus. Conclusions: Exotropia is more common than esotropia surgery in a hospital in northeast China. During these years, the proportion of exotropia increased gradually, while the proportion of esotropia did not change significantly. Intermittent exotropia is the most prevalent type of strabismus. In addition, patients under the age of 12 years are the most common cases among all age groups.