The invention provides an electric sliding rail system for a large-capacity refrigerator drawer. The problems that an existing refrigerator drawer sliding rail is inconvenient to operate and unreliable in opening and closing are solved. A driving sliding rail assembly and a driven sliding rail assembly are symmetrically mounted on the two sides of the refrigerator drawer; sliding rail assemblies are connected with the side wall of a refrigerator inner container, and each sliding rail assembly comprises a fixed guide rail, a connecting guide rail and a sliding guide rail; the fixed guide rails are mounted on the inner side wall of the refrigerator inner container through a fixed guide rail support, the sliding guide rails are connected with the refrigerator drawer through a sliding guide rail support, the sliding guide rails are in sliding connection with the fixed guide rails through the connecting guide rails, and the two sliding rail assemblies are sliding rail drive assemblies and are mounted on the driving sliding rail assembly, the driving sliding rail assembly drives the driven sliding rail assembly to synchronously move through a synchronous assembly, the sliding rail drive assemblies drive the driving sliding rail assembly to act in a touch control manner, meanwhile, the driving sliding rail assembly drives the driven sliding rail assembly to synchronously act through the synchronous assembly, and opening or closing of the refrigerator drawer is achieved.