GB/T 6093-2001 is formulated around the length standard gauge block in the Geometric Quantity Technical Specification (GPS). It clarifies the definition, classification and grading rules of the gauge block, and puts forward strict requirements for the size and shape error of the gauge block. Detailed description of the material characteristics of the gauge block manufacturing to ensure its dimensional Stability. The standard gives the method of verification of the gauge block to ensure the accuracy of the quantity through high-precision measurement. At the same time, it stipulates Encasement and storage conditions. The standard provides the basis for the production, use and management of the gauge block. The gauge block is used as a length reference to help the mechanical manufacturing, Measurement calibrating and other fields to achieve high-precision dimensional measurement, and ensure product mass and interchangeability.