Abstract: The purpose of this study was to optimize the performance index of camellia shell breaking machine. The parameters affecting the Camellia shell breaking machine were determined by the machine design parameters, namely the roller speed, the track angle, and the cylinder pressure, and a single factor orthogonal test was performed on it.The results showed that the cylinder pressure> stick speed> track angle, and the best working condition of the camellia shell breaking machine was 40° track angle, roller speed 80 r/min, and cylinder pressure 3 bar, Under these conditions, the shell breaking rate was 94.5%, the sub-breaking rate was 1.8%, and the shell-containing rate was 17.1%, it met the working requirements..

Key words: Camellia, shell breaking machine, shell breaking efficiency, orthogonal test