The invention discloses a rotor magnetic field oriented vector control method based on a big data model. An offline rotor flux linkage model and a space angle model are established based on big data historical values of motor parameters, local model parameters are updated according to new data acquisition and multi-parameter big data update to obtain a new rotor flux linkage model and a new spaceangle model, and space angle and rotor flux linkage feedback quantities are provided for a motor system according to motor operation conditions, so as to realize control over a multi-motor system. Themethod comprises a multi-reference data acquisition stage, a big data processing stage and a local adjustment stage. A big data model method of accurate feedback values can be provided without motorbody parameters, and finally, control over a multi-motor system is achieved.