The invention discloses a drying system and method for polyvinyl chloride. The drying system comprises a slurry groove (1), a centrifugation device (2), a vibrating feeding device (3), a fluidization bed (4), a vibrating screen (6), a material bin (8) and volatile matter measuring devices (9), wherein the slurry groove (1) is used for containing polyvinyl chloride slurry, the centrifugation device (2) is used for conducting initial centrifugal drying on the polyvinyl chloride slurry so that polyvinyl chloride wet cake and centrifugation mother liquor can be obtained, the vibrating feeding device (3) is used for conveying the polyvinyl chloride wet cake to the fluidization bed, the fluidization bed (4) is used for conducting secondary fluidization drying on the polyvinyl chloride wet cake so that polyvinyl chloride semi-finished products can be obtained, the vibrating screen (6) is used for screening the polyvinyl chloride semi-finished products so that polyvinyl chloride products can be obtained, the material bin (8) is used for storing the polyvinyl chloride products, and the volatile matter measuring devices (9) are used for conducting volatile matter measurement on the polyvinyl chloride slurry, the polyvinyl chloride wet cake and the polyvinyl chloride semi-finished products. The drying system for the polyvinyl chloride can rapidly and effectively dry the polyvinyl chloride and achieves utilization of waste heat.