During the preparation of the poly(vinyl chloride) (PVC) slush powder, we found that PVC resins obtained by different polymerization methods affected many properties of slush powder and its products. Two types of commercial PVC resins were used for slush powder preparation: mass poly(vinyl chloride) (M-PVC) and suspension poly(vinyl chloride) (S-PVC). We used the Haake rheomix test to characterize the absorption of plasticizers into PVC resins, and the results showed that M-PVC absorbed the plasticizers more quickly than S-PVC. The fusion behavior of the two slush powders was studied by the thermal plate test and Haake rheomix test, and the results showed that the slush powder of M-PVC was easier to fuse than that of S-PVC. The different properties of the two resins and slush powder could be explained by the morphology, average size, and size distribution. Due to the "skin" of the particles' surfaces, the wider size distribution, and the large size of particles, S-PVC absorbed the plasticizers more slowly and was more difficult to fuse.