The utility model discloses a formwork for a reinforced block shear wall ring beam. The formwork comprises an inner jacketed wall bottom ridge, an outer jacketed wall bottom ridge, an upper split bolt, a lower split bolt, a lower seal side, an inner side form, an outer side form, an inner upper back ridge, an outer upper back ridge, an inner joint back ridge, an outer joint back ridge, an inner joint panel, an outer joint panel and a separating adhesive tape, and is characterized in that the inner and outer side forms are respectively composed of an inner side vertical ridge, an outer side vertical ridge, an inner side panel, an outer side panel, an inner side upper seal side and an outer side upper seal side; the inner and outer side vertical ridges are respectively fixedly arranged on the side faces of the inner and outer side panels at intervals; the inner and outer side upper seal sides are respectively fixedly arranged at the upper sides of the inner and outer side vertical ridges; the separating adhesive tape is adhered to the inner side upper seal side; the inner and outer side forms are respectively connected with the joint panels through the inner and outer joint back ridges; the bottom ends of the inner and outer side vertical ridges are respectively fixedly arranged on the inner and outer jacketed wall bottom ridges; the inner and outer jacketed wall bottom ridges are connected through the lower split bolt; the lower seal side is located at the outer sides of the inner and outer side forms and is fixedly arranged on the inner and outer jacketed wall bottom ridges; and the inner and outer upper back ridges are respectively located at the outer sides of the inner and outer side forms and are connected through the upper split bolt. The formwork for the reinforced block shear wall ring beam disclosed by the utility model can be made in a standard manner and is low in cost.