Abstract: As is known that large number of control components and complicated data dimension transformation seriously reduce efficiency for building modular multilevel converter (MMC) model. Targeting at the above problems, a convenient and efficient modelling method for MMC control system based on CPS-SPWM is proposed in this paper. The scheme calls subroutines to package classic controller to deal with large amount of control components and transformation between data with different dimension. Equivalent control subroutines are designed in the packaged controller, which significantly reduces the labor of duplication of large amount of control components and saves computational resources. The control signals are designed and processed in array form, which significantly simplifies the complextiy of the large amount of signal exchange. Simulations results in PSCAD/EMTDC show that the packaged controllers share same accuracy with model using control components.