The promotion of digital braille in the information age can help to improve the cultural quality and living standards of blind people in China. This study implements a Chinese-braille conversion system based on the national general braille (NGB) tone rules, which can quickly generate a large number of digital resources in line with the NGB rules and make visually impaired people obtain information without barriers. This system processes Chinese text according to the NGB tone rules and converts it into braille that conforms to tone rules and abbreviation rules. The test results show that the system can accurately process the tone rules and abbreviation rules and obtain accurate digital braille that is in line with the NGB tone rules. In addition, the coverage rate of tonal and final abbreviations and the increase in length are all comparable to the theoretical values of the NGB tone rules. The system can quickly process long-form corpus files and execute programs efficiently. Furthermore, it has practical value and can be used to promote the NGB and promote the barrier-free construction of digital braille in China.