Abstract: To make the test and calibration schemes in product measurability design compatible with the digitalization of product design, typical digital models and construction methods for test and calibration schemes are proposed. These are used for the digital modelling and simulation verification of test and calibration schemes during the measurability design process. The development and application status of measurability design in industrial product design are introduced. A measurability design process based on MBSE (Model - Based Systems Engineering) methodology is established, and research on the construction methods of digital models for test and calibration schemes is carried out using SysML (Systems Modelling Language). Taking the calibration scheme of a typical optical measuring instrument as an example, a digital model is constructed based on domestic MBSE software, and virtual simulation verification and processing analysis are carried out in combination with measured data. Results show that the proposed digital method provides a unified model framework for test and calibration schemes in measurability design, and enables the convenient and rapid construction of digital models for virtual simulation verification. The method proposed in this paper is compatible with MBSE, meets the digital requirements of product measurability design, and also provides a reference for the digitalization of test and calibration schemes.