The invention provides a gas sensitive element anti-condensation method and device. The gas sensitive element anti-condensation device comprises a gas sensitive element, an installing plate and a case, wherein the gas sensitive element is arranged on the installing plate, and arranged in an inner cavity of the case. The gas sensitive element anti-condensation device is characterized in that the surface of the outer periphery of the gas sensitive element is provided with electrical heating elements, the electrical heating elements are arranged on the installing plate through pins, a gas inlet is arranged on the case, and the gas inlet is communicated with the inner cavity of the case, and is opposite to the bottom surface of the gas sensitive element. The gas sensitive element can maintain higher temperature so that the condensation of optical surfaces inside the gas sensitive element can be avoided in high-humidity environment, and the detection precision and the detection sensitivity can be improved. Thereby, the invention is very suitable for being used in coal mine undergrounds in China, and has great economic benefits and social benefits.