The invention provides a shoe surface sizing method and a sizing device with reasonable structural design and simple operation. The method comprises the steps of S1, firstly setting a glue line edge line (1') along the upper side on the lower portion of the shoe surface, setting a sizing area (2') between the glue line edge line (1') and the side edge bottom of the shoe surface, setting the glue line edge line (1') of the shoe surface sizing area (2') as a reference, and offsetting an appropriate distance to the shoe surface sizing area (2') to determine a glue-rolling track (3'); S2, conducting glue-rolling treatment along the glue-rolling track (3') by a glue-rolling device, and using the glue-rolling device to roll a circle of glues along the glue-rolling track (3') on the sizing area (2'); S3, after the completion of the glue rolling, using the glue line edge line (1') of the shoe surface sizing area (2') as a reference, and offsetting an appropriate distance to the shoe surface sizing area (2') to determine a glue spraying track (4'); S4, conducting glue-spraying treatment along the glue spraying track (4') by a glue-spraying device, and using the glue-spraying device to spraya layer of glues along the glue spraying track (4') on the sizing area (2').