The utility model discloses a vertical gas-liquid separator, comprising a pre-rectifying module, a rectifying module and a vertical separate module, wherein the pre-rectifying module is communicated with the rectifying module while the rectifying module is communicated with the vertical separate module; the pre-rectifying module is a pipeline; the rectifying module is three parallel pipelines; the three parallel pipelines referring to the rectifying module are respectively communicated with the pipeline referring to the pre-rectifying module; the vertical separate module is a vertical pressure container; the three parallel pipelines referring to the rectifying module are led inside the vertical pressure container at a downward angle of 25-30 DEG C; a filter net is arranged at an air outlet in the top of the vertical pressure container; and a vortex breaker is arranged at a liquid outlet in the lateral wall of the bottom of the vertical pressure container. The vertical gas-liquid separator can separate most of gas from a medium. Thus, the vertical gas-liquid separator is high in separating efficiency, convenient to operate, and excellent in performance; and the separator has the characteristics of few consumables, light weight, simple and flexible style, low cost, long service life and the like, and is especially suitable for the treatment process of the gas containing oil and water in the field of gas field gathering.