The car cabin filter selects dual effect activated carbon and PET low resistance polyester filament materials. The dual effect of activated carbon is of high adsorption ability that it could absorb various materials such as all kinds of harmful gases, odors and other pollutants within the car air, thus leading to a fresh, healthy indoor air environment for drivers and passengers. PET low resistance polyester fiber material can completely use a good filter effect to smooth air circulation produced by them, ensuring ventilation system load reduction optimization energy consumption while efficient filtration.