The present invention relates to the field of fixing methods, and in particular to a fixing method of a getter and a suction structure. The fixing method comprising the steps: smearing the getter intoan accommodation part of a non-sealed structure to form the suction structure; baking the suction structure according to a set temperature and a set time; and welding the suction structure to a metalcover plate of a source device through laser. According to the fixing method, the getter is firmly fixed to the source device through the accommodation part, and due to a restriction effect of the accommodation part, even if the source device is subjected to vibration during the use, the getter does not have powder drop, so that the suction effect is ensured.