To improve the regulation of energy-efficient operation and the hydraulic misadjustment for variable flow heat-supply systems,the dynamic hydraulic conditions and control strategies for the heat-supply network were investigated.The authors analyzed the control mode of circulating pumps with variable speed and the characteristics of pipeline network with pressure differential control for end user in a variable flow heat-supply system.Within the pressure difference and flow range of self-operated pressure differential control valves,the hydraulic operation characteristics of a heat-supply network in a variable flow heating system with users’selfcontrol were studied based on a practical case.The corresponding control strategies were put forward as follows:increasing the design value of pressure difference for end user,or changing the control point of the worst pressure difference,or monitoring the pressure differences of the critical users and fixing distribution pumps at these places.