ARINC661 provides the interface specification for Cockpit Display System(CDS)and User Application(UA),which has become the basis of modern cockpit display development.In the ARINC661 specification,the CDS kernel is re-sponsible for loading definition files to achieve display management,but the current desktop software supporting definition file design can no longer meet the needs of flight crews to evaluate the display screen online.In this paper,the basic display li-brary,logical storage structure of display components,component display cascading rules,data update interface and logic are encapsulated and designed according to the operation mechanism of CDS.After testing and verification,the results show that the functions of the cockpit display kernel are normal and can realize the preview of cockpit display on Web.