The invention aims to provide a filter material containing a polyimide fiber and a preparation method for the filter material as well as a filter device comprising the filter material. A sulphone-containing aromatic polymer fiber is added in the filter material and has excellent fiber strength and high-temperature resistance, so that the filter material can be used in a high-temperature environment at 250 DEG C for a long term and has high-temperature size stability being within 1%. The polyimide fiber serves as a dust treatment layer and the sulphone-containing aromatic polymer fiber serves as a high-temperature-resistant supporting layer, so that the prepared filter material has a good filter effect, excellent high-temperature size stability, high high-temperature strength retention rate and high elongation retention rate.