In ventilation rate limited environment, how to reduce the explosion-proof diesel engine emissions targets was particularly important.  Through reforming the explosion-proof diesel engine at various stages in the process of analysis and comparison of various explosion-proof ways in actual use, the thesis put forward from the prototype pause type, design of exhaust system design, the exhaust gas temperature, exhaust catalytic device applied, practical use of maintenance and other aspects to reduce explosion-proof diesel engine emissions targets, so as to effectively reduce the pollution of the environment.