In order to improve the voltage transfer ratio of matrix converter and accelerate its application in the field of power transmission, a novel ACDCAC Sepic matrix converter based on matrix rectification and AC chopper is presented in this paper. Firstly, the topology and working principle of Sepic inverter is introduced. Based on the above analysis, the topology of Sepic matrix converter is also introduced. Then, the modulation strategy used in rectifier stage and inverter stage is expounded. Finally, the correctness of the topology and the feasibility of the modulation strategy are proved by simulation and prototype experiments. The simulation and prototype test results show that the voltage transmission of this system can reach 1 and above, which breaks through the traditional voltage transfer ratio of matrix converter 0.866 maximum limit, and the system output voltage and current waveform distortion is very small, so it has good value of research.