The utility model relates to the technical field of coal mine roadway support, and discloses a mining double-layer grid metal net which comprises an upper-layer longitude and latitude net and a lower-layer rhombus net, the longitude and latitude net is flatly laid on the upper side of the rhombus net, and the longitude and latitude net is fixedly connected with the rhombus net through binding wires. The warp and weft nets on the upper layer have certain flexural rigidity and are tightly attached to the surrounding rock, the rhombus net on the lower layer has flexibility, the warp and weft netsand the rhombus net are combined into a double-layer metal net with the strength, toughness and rigidity capable of adapting to large deformation of the surrounding rock, bad deformation of the surrounding rock is prevented, the occurrence probability of net bags is reduced, roadway rapid damage is avoided, and the supporting effect is improved.