The utility model relates to a westernblot gel scale belongs to medical equipment technical field. The utility model provides a current SDS the easy technical problem who cuts away purpose albumen among big, the with high costs and cutting process of the consumptive material that exists during PAGE gel exciser. The utility model provides a westernblot gel scale, wherein: including white bottom plate and plastic wrap, the plastic wrap is established in white bottom plate top, 88 squares are carved with on white bottom plate upper surface right side, square weft is red, square warp is blue, albumen molecular weight mark is carved with in white bottom plate upper surface left side, albumen molecular weight mark carries out the mark according to protein ladder. The utility model has the advantages of easy operation, save material, cutting accuracy, repeatedly usable, convenient to carry, with low costs, efficient.