The invention discloses a compaction process of collapsible loess roadbeds. The compaction process comprises the steps of 1, natural water content measuring; 2, water replenishing, turning and braising; 3, water content inspecting and truck loading; 4, spreading, static pressing and leveling; 5, rolling, wherein the loess roadbeds subjected to the leveling treatment sequentially undergo the treatment of one time of static pressing, two times of spiky rolling, leveling by a land leveling machine, two times of vibratory pressing and one time of static pressing and shining, and the rolling operation needs to be carried out for six times. According to the compaction process, reasonable filling construction can be realized on the dry condition of the northwest district, the roadbeds at the collapsible loess section are rolled for six times in the filling construction process, and therefore the filling construction quality of the roadbeds is guaranteed further; sedimentation at the later stage can be reduced, high safety capacity can be obtained, the stability of the roadbeds can be guaranteed, and diseases can be avoided.