The invention discloses an on-line scheduling method for real-time service distribution of a distributed type data center. According to the on-line scheduling method, a target is optimized by utilizing a starting type branch-and-bound method according to a feedback result of the specific distribution of a load flow path under a transmission delay condition; the problem of restraining the model parameter coupling by the delay in a mixed integral linear plan is effectively solved; the on-line scheduling method has high speed, accuracy and high efficiency; and especially, under the condition of greatly increased number of front-end servers and data centers, the advantages of high efficiency and high speed are more effectively reflected.