Disclosed is a stream priority control method based on a multi-attribute decision. The method is based on an HPFF kernel unit, which comprises a hook module, a stream information table and a stream classifier. In a round-trip delay RTT of a packet from a source host to a destination host path, the HPFF kernel unit updates and maintains attribute information of streams, calculates the priority of each stream, labels the priorities of the streams, calculates the expected transmission rate of the streams according to the demands of the streams, and calculates and controls the transmission rate ofthe streams according to the priorities of the streams. The method has the advantages: the HPFF calculates the priorities of the streams through multiple attributes of the streams, so that the costsof the service streams can be better evaluated and more accurate information can be provided for stream scheduling over the existing single-attribute decision method; the HPFF does not need to modifynetwork applications and switch functions, so the method has practical deployability; and compared with the existing methods, HPFF significantly reduces the number of invalid streams in a network andimproves the performance of the network.