The invention discloses an automatic evaluation method for a power supply scheme design drawing, and belongs to the technical field of automatic evaluation. According to the method, a drawing block name and coordinate information in the power supply scheme CAD design drawing are converted to specific components and a spatial layout, and an interconnection state and a layout of the components are extracted according to a spatial geometric theory; and then each component node is traversed, matching with a rule corresponding to the components in a database is carried out, problems and errors in a using or connecting process of the components in the power supply scheme CAD design drawing are found, the errors in a file for the power supply scheme CAD design drawing are marked according to different error levels, and finally an evaluation report for the power supply scheme CAD design drawing is generated. According to the method, an evaluation process for the power supply scheme CAD design drawing is simple, an operation principle is reliable, the error identifying correctness is high, the evaluation efficiency is high, and the evaluation work for the power supply scheme CAD design drawing is simplified.