The ever-growing world population demands material consumption and drives material discovery. Material design is gradually breaking through the assumption of continuum system. The bottom-up combination of different microstructures into complex building blocks has opened unprecedented opportunities in materials science and engineering. Micro/nano structural materials can extensively take advantage of the physical, chemical and mechanical properties of micro/nanoscale units, achieving more excellent mechanical properties and functions compared to traditional materials. Traditional mechanical studies have been unable to establish the theoretical framework of advanced materials at multiscale, resulting in more common scientific problems emerged from interdisciplinary fields. Although modern physics edged mechanics out into the wilds of engineering, we should note that there is plenty of room in the cross field of mechanics and advanced materials. The development of computational multiscale mechanics has covered from the physical edge at atomistic scale to the framework of continuum theories. It is of the utmost importance to extend the models and methods of computational multiscale mechanics that would provide in-depth understandings for the structure-property-function relationships of materials. The topics of this minisymposium focus on the computational multiscale mechanics for microstructure design of hierarchical materials, low-dimensional materials, biomimetic structural materials, biomass-derived sustainable materials and so on. Toward the digital age and sustainable future, this minisymposium seeks to boost the computational mechanics-guided design for high-performance materials.