The invention discloses a permanent magnet synchronous motor control system. The permanent magnet synchronous motor control system comprises a control module comprising two processors, a drive module, a power module and a permanent magnet synchronous motor. The two processors are a singlechip and a signal processor, wherein the singlechip is used as a master processor, and the signal processor is used as a slave processor. According to the permanent magnet synchronous motor control system, a master-slave control method is adopted, the effects that the singlechip is strong in control performance and the signal processor is strong in computing performance are achieved at the same time, and the demands of multi-task scheduling and processing and high real-time performance of an electric vehicle or a hybrid electric vehicle can be met.