During the SAGD production of super heavy oil reservoirs using dual-horizontal wells，the accurate and rapid judgement of the effective producing degree of the horizontal section is the basis for well group production measure parameter formulation and field parameter adjustment. The conventional method of judging the effective producing degree based on the temperature has limitations due to the different controlling factors of bottom hole temperature at the toe and non-toe points of the production well. Firstly，the main factors affecting the temperature at the toe and non-toe points of the production horizontal wells were clarified from the perspective of heat supplement and loss in horizontal wells. Through numerical simulation and theoretical formula analysis，the dimensionless productivity parameters per unit horizontal section and the mathematical model with temperature and pressure coupled along the horizontal well were introduced. The producing degrees at the toe and non-toe points were judged，respectively，and then，a method of judging the effective producing degree of the SAGD horizontal section was formed. On this basis，the producing degree of 155 SAGD well groups in the normal production stage was studied，and the reliability，convenience and easy operation of this method have been confirmed. Combined with geological factors，five production modes were established，and the production characteristics of different modes were analyzed. It is clear that the main controlling factor that affects the SAGD production effect is the producing degree of the horizontal section，which provides the basis for field parameter control and measure regulation.