Abstract: To improve driving performance and tea processing quality of tea carding machine, mathematical mode for tea carding machine optimum design was established in this paper. Based on the ant colony algorithms and Matlab, the realization programs regarding parameters simulation of tea carding machine were made. The programs were used in optimization simulation of the key transmission parameters. The optimization results and proving trial showed: when crank length was 59.1 mm, connecting rod length was 341.5 mm, eccentricity was 57.5 mm, slider stroke was 120 mm, auxiliary angle was 8.26°, angle between the two limiting positions was 3.5°, minimum transmission angle should changed from 50° to 70.1°, the noise decreased 5dB, and stripping tea rate increased 6%. The research can provide theoretical basis for improving the tea carding machine.