The utility model relates to a temperature swing adsorption device for protection film separation equipment and a method for performing temperature swing adsorption by using the device, and solves the problems that the performance of the film equipment is reduced, the service life is shortened and safe and stable running of the device is affected as an adsorption tank and the separation equipment of an existing methyl alcohol synthesis device cannot thoroughly adsorb and prevent harmful components in raw material gas from damaging a film. The device comprises a coalescence type filter, a first packing tower, a second packing tower, a regenerated gas cooler, a regenerated gas heater and a regenerated gas separator. The method comprises the steps of 1, an adsorption process, 2, a pressure reduction process, 3, a heating process, 4, a blow-cooling process and 5, a boosting process. The temperature swing adsorption device is used for a methyl alcohol blowing-removal gas extraction coal based natural gas device.