The invention provides an improved steam assisting gravity oil discharging oil producing method. The method comprises the following steps of preheating two steam assisting gravity oil discharging horizontal wells in parallel distribution; injecting steam into the steam assisting gravity oil discharging horizontal well positioned at the upper part; using the steam assisting gravity oil discharging horizontal well positioned at the lower part as a producing well for production; respectively deploying two horizontal wells at the two sides of the steam assisting gravity oil discharging horizontal well pair, and using the two horizontal wells as steam assisting gravity oil discharging compensation wells; respectively injecting a certain amount of steam into the two horizontal wells used as the steam assisting gravity oil discharging compensation wells; and then, performing soaking and well opening production. The improved steam assisting gravity oil discharging oil producing method has the advantages that the horizontal well steam puff and huff is used; a region which is not involved by a conventional steam assisting gravity oil discharging steam cavity is sufficiently heated, so that the steam assisting gravity oil discharging steam cavity communicates a steam cavity formed through puff and huff heating; the steam involving range is expanded; the volume of the steam cavity is increased; further, the reserves loss is reduced; and the yield is improved.