The invention discloses a multi-path load balancing method based on the price mechanism for an industrial real-time network. The method specifically comprises the following steps: an RYU control sendsa data packet to sense an overall network topology; real-time bandwidth and delay monitoring is carried out through the OpenFlow protocol; k shortest paths from feasible paths are calculated throughthe KSP algorithm and used as candidate path; link evaluation is carried out on the k candidate paths, the candidate path with the optimum current link status serves as a forwarding path, and the candidate path with the second optimum current link status serves as a reserved path; the RYU controller sends a forwarding strategy for a current network flow to flow tables of corresponding switches; and the RYU controller carries out real-time link status monitoring, and when a link utilization rate is larger than a threshold, reselects the optimum path other than the current path for rerouting andsends the flow tables to the switches. The method provided by the invention has the advantages that the network resource utilization rate can be improved, and network congestion can be reduced; and an SDN controller is used for whole network monitoring on a data center, and the forwarding path is selected according to current real-time network conditions, so that dynamic multi-path load balancingcan be achieved.