The invention provides a DSP-FPGA/CPLD multi-dimensional interconnected control method. The method is applied to a controller including a digital signal processor (DSP) and a field programmable gate array/complex programmable logic device (FPGA/CPLD) chip. The DSP and the FPGA/CPLD carry out data exchange through an external memory extended Xintf interface or a general input/output GPIO interface.The DSP is used for carrying out external signal sampling and carrying out analog-to-digital conversion, data operation, and processing on the external signal, transmitting calculated duty cycle datato the FPGA/CPLD; and the FPGA/CPLD is used for generating a PWM signal based on the received duty cycle data. According to the invention, the controller has high universality and expansibility; theclear division of work as well as function and action coordination and synchronization is realized; and the need of control of various power electronics and motor systems is met.