Combined heat and power generation heat supply system capable of improving heat supply quality and control method thereof

The invention discloses a combined heat and power generation heat supply system capable of improving heat supply quality and a control method thereof, and solves the problem of how to improve the primary side waste heat utilization rate and the secondary side heat supply quality. According to the control method, the high-quality return water temperature of a secondary pipe network is set firstly, the heat exchange amount of a coil radiator (6) in a closed shell (11) is adjusted by controlling the rotating speed of an electric fan (12), meanwhile, the heat supply amount in a first user system (22) is adjusted by adjusting a user-level return water electric control adjusting valve (7), then the heating effect of a user is improved, heat waste of the user is reduced, and the energy utilization rate is increased; and in addition, the secondary side heat supply quality can be improved by setting a high-quality heat supply return water temperature value of a secondary return water pipe network (8) in a user heat ex