The invention discloses a construction method for a Mars detector component-level virtual model machine library. The method comprises a step of transforming a *.prt file to generate a *.3DS file, and using the *.3DS file and an equipment mating table to generate a Mars detector component three-dimensional model file library and a Mars detector component information database; a step of establishing an interaction interface for generating a three-dimensional model of a Mars detector component virtual model machine according to the Mars detector component three-dimensional model file library andthe Mars detector component information database; a step of using the interaction interface to invoke the Mars detector component three-dimensional model file library and the Mars detector component information database to invoke the selected model and the information data for image-text display, and a step of re-selecting the model or rotating and zooming the model by the interaction interface. The construction method for the Mars detector component-level virtual model machine library achieves modeling of the elements in the Mars detector component-level virtual model machine library and meets the requirement of showing to the users or workers in a way of combination of the three-dimensional model and the information data.