The upper limit of coal education and training in China is the number of years of study. According to the relevant information, China Coal Education and Training adopts the fragmented learning mode, and the online learning time is not less than 90 days per year, and the upper limit of daily learning time is 15 minutes. The upper limit of learning time is reached after 15 minutes. China Coal Education and Training app is an online training software for employees engaged in the coal industry, which can be used to learn industry knowledge. Its courses are very rich and the classification is complete, so enterprises can let employees learn according to online courses.