The invention discloses a heat supply control valve with an accurate metering function. The heat supply control valve with the accurate metering function comprises pipeline connectors, an electromagnetic flowmeter, an electric ball valve, a water inlet temperature sensor, a water return temperature sensor and a control device, wherein when the device is transversely placed as a whole, the first pipeline connector, the electric ball valve, the electromagnetic flowmeter and the second pipeline connector are sequentially connected from left to right; and the control device is fixedly connected to the upper side of the electric ball valve, and a through hole for the water inlet sensor to insert is formed in the lower side of the electric ball valve. According to the invention, the electric ball valve, the electromagnetic flowmeter, the water inlet temperature sensor, the water return temperature sensor and a measurement control circuit are integrated to form a closed-loop feedback control system, constant-flow heat supply or constant-power heat supply of the heat supply system can be realized, and the heat supply control valve with the accurate metering function is the optimal product for achieving balance of a heat supply pipe network and reasonable heat distribution, and has very positive significance on energy conservation and consumption reduction of the heat supply system.