Ruminants have shared a long history with humans as they can efficiently utilize fibrous plant materials, and economically produce nutritionally valuable high-protein foods, such as meat and milk. Ruminant gastrointestinal tract (GIT) microbiomes play major roles in their host health and production. To considerably contribute to the understanding of the ruminant GIT microbiome, we therefore elected to generate the ruminant GIT microbial gene catalog comprising 154,335,274 genes and genome compendium, from 370 samples of GIT contents, spanning the seven ruminant species. In addition, we assembled nonredundant 10,373 metagenome-assembled genomes (MAGs), including 8,745 novel uncultured bacterial and archaeal species. This web all the gene catalogs, annotation information, abundance profiles, assemblies, predicted ORFs, and 28,543 Illumina bins from this study.