The invention discloses multilayer double-side foamed functional fabric and a production process thereof. Through yarn design, color features of functional fiber are utilized to develop fancy yarn for fabric production, so that textiles meet functional needs of market and have fashionable features, and market space of the functional fiber is expanded. The fabric is multilayer, fluffy, heat-insulating, antibacterial, moisture-permeable, breathable, fashionable and unique in structure, both the front and the back of the fabric can be used, and weft yarn of a middle layer contracts to lead to upheaval of surface and inner layers to form crape.