The invention relates to a multi-epitope density relay checking platform which solves the technical problems that current density relay checking devices are used for one-to-one checking, time is consumed and manpower is wasted. The multi-epitope density relay checking platform comprises a main unit and a checking table. The multi-epitope density relay checking platform is characterized in that a first support and a second support are vertically arranged on the checking table, a plurality of rows of density relay mounting frames are mounted on the first support, each row is provided with a plurality of density relay mounting frames, a gas output connector and a contact input connector are respectively mounted on the first support on one side of each density relay mounting frame, and each gas output connector is connected to the main unit through a connecting pipe and a pipeline splitter. The multi-epitope density relay checking platform is simple to operate, reasonable in structure, smooth in running and high in checking safety and accuracy, multi-project test or check of a plurality of density relays can be rapidly and automatically finished, checking time is shortened, and manpower and material resources are saved.