In the gas explosion mine disaster, the mine blast-proof door is often severely deformed and cannot be closed in time, so that the downhole airflow and the surface air are short-circuited by the wind, the mine can not carry out the wind, and the toxic gas can not be effectively discharged, causing a large number of casualties. To solve the defects of the original blast-proof door in applications, in this paper, a novel blast-proof door system is designed, which can be quickly reset after pressure relief of mine gas explosion. The scenario of a gas explosion in an underground coal mine was simulated. Through the experimental platform, the safety protection performance of the novel blast-proof door under different explosive equivalents was experimentally studied and analyzed. The performance parameters such as the pressure and stress acting on the novel blast-proof door were experimentally studied. The experimental results show that under the conditions of different explosive equivalents, the main part of the novel blast-proof door did not obviously deform, so the overall design of the novel blast-proof door is reasonable and has good safety protection performance. To further study the pressure distribution law and pressure-relief effect of the novel blast-proof door, the FLUENT software was used during the explosion. The research shows that the strength of the novel blast-proof door satisfies the design requirements, the main part has not been obviously deformed, and the entire novel blast-proof door system has excellent safety protection performance. The novel blast-proof door can solve the problem that the existing often be severe deformation in the gas explosion and not timely closed. So the investigation provides a novel designing ideas, research methods and theoretical support for enriching the technical means to prevent gas explosion disasters. It has important practical significance for improving the mine disaster prevention technology level and minimizing the loss of gas explosion disaster. CITATION:Pan, R K, Qiu, T, Wang, J, Zheng, L G, Zhang, X B and Yu, M G, 2019. A study on the performance of novel blast-proof door under gas explosion, in Proceedings Australian Mine Ventilation Conference 2019, pp 202212 (The Australasian Institute of Mining and Metallurgy: Melbourne).