The invention discloses a dental sponge-shaped flexible material hemostatic gingival retraction device. The dental sponge-shaped flexible material hemostatic gingival retraction device includes a syringe and a needle, wherein the needle sleeves the front end of the syringe; a shoulder clamping groove is formed in the needle, and the pinpoint of the needle is a roundedpinpoint; a sponge-shaped flexible material is arranged inside a syringe tube of the syringe. Through the syringe, the sponge-shaped flexible material is injected between an alveolar bone and an abutment shoulder along a gingivalsulcus, during injection, the shoulder clamping groove is pressed on the abutment shoulder, the concave face of the pinpoint enters a gingiva, when the sponge-shaped flexible material is in contact with gingival crevicular fluid and blood, volume expansion of the sponge-shaped flexible material occurs rapidly, and meanwhile, both produced pressure and the hemostatic capacity of the sponge-shaped flexible material can conduct hemostasis rapidly. When the gingival sulcus is thoroughly extruded by the expanded sponge-shaped flexible material, the alveolar bone is separated from the shoulder, theedge of the gingiva is pushed away, the abutment shoulder is fully exposed, and therefore precision needed by digital scanning and traditional impression can be easily met.