Abstract: The paper separately introduced installation position, installation mode, working principle, effect and importance of “six protection” of coal mine belt conveyor namely non-slip protection of driving roller, coal-piling protection, protection against side running, temperature protection, smoke protection and sprinkling protection over temperature on the basis of field application of “six protection” of belt conveyor of Jining No.3 Coal Mine. It pointed out that coal mine enterprises should reasonably select, install and use “six protection” according to actual condition and coordinate with other protections, so as to make belt conveyor run normally.