Abstract: Nowadays the arrangement of English letters on the key panel of cell phone is alphabetical, but it is unsuitable for the input of Chinese pinyin system because of long searching time and slow convergence rate. Introducing the abortion mechanism and evolutionary mutation coefficient into the unsuitability model for cell phone, the breeding algorithm is improved and available to solve the problem as above with the English letters arranged in optimized order on the key panel of cell phone, thus improving greatly the inputting efficiency of Chinese characters. Simulation results showed that the improved breeding algorithm has higher computation speed with better convergence results.