The invention relates to an elastically-sealed automatic sprinkler head. The automatic sprinkler head comprises a body, a thermosensitive element, an adjusting bolt, a water splashing deflector, a ball seat, an elastic gasket, a cover-shaped elastic sheet, an inner sealing washer, an outer sealing washer, a sealing washer, a sealing ring and the like, wherein the elastic gasket, the ball seat and the cover-shaped elastic sheet can be selectively and respectively inosculated and equipped with the inner sealing washer, the outer sealing washer, the integrated sealing washer and the sealing ring with different section shapes such as a single-lip shape, a double-lip shape, an outward-turned single-lip shape, an outward-turned double-lip shape and an L shape. By virtue of different sealing surface types, the non-extrusion type elastic sealing as well as hydraulic-power sealing and hydraulic-pressure sealing of the automatic sprinkler head can be realized, the required sealing surfaces are reduced, the assembly pretightening force of the sealing surfaces and the normal temperature creep value of non-metal materials are reduced, long-time sealing performance can be achieved, and besides, when the thermosensitive element is opened and released in a fire, sealing elements are not adhered to the sealing surfaces of the body and can be separated easily, so that the sprinkler head can automatically spraying water for extinguishment.