Sketch scoring is one of the important means to cultivate sketch ability. With the popularization and deepening of the sketch grading test, more and more people join the sketch grading test to promote sketch learning through the grading test, so as to continuously improve the modeling ability and sketch creation level. Sketch grading is an important part of art grading. It is a test method to evaluate and identify the artistic level of sketch participants through unified evaluation criteria under standardized operating procedures, and it is an important way to test the quality of sketch teaching and learning effect. Sketch is not only the basic training means of plastic arts, but also an art form with independent aesthetic value. Sketch can not only cultivate our observation ability, generalization ability and personalized painting style, but also improve our memory ability and dictation ability of images. Sketch also has the characteristics of easy operation.