The invention provides a vitreous microbead lightweight thermal insulation wall block. The vitreous microbead lightweight insulation wall block includes bed material, medium material, surface materialand a gridding cloth, the fabric and the bed material are composed of the following components, by weight: 100 parts of sulphoaluminate cement, 2-8 parts of fly ash, 0.5-3 parts of iron oxide yellow,0.5-2 parts of silica fume, 2-6 parts of a vitreous microbead, 1-2 parts of mekralon, 0.05-0.1 part of trisodium phosphate, 0.01-0.02 part of organosilicon, and 35-50 parts of water; the medium material is composed of the following components, by weight: 100 parts of the sulphoaluminate cement, 2-8 parts of the fly ash, 0.5-2 parts of the silica fume, 15-25 parts of the vitreous microbead, 1-5 parts of a polystyrene granule, 0.05-0.1 part of the trisodium phosphate, 0.001-0.01 part of oxalic acid, 0.01-0.02 part of organosilicon, 0.01-0.015 part of sodium butylnaphthalenesulfonate, and 30-40parts of the water. The wall block has the advantages of low cost, high strength, long service life, excellent insulation and sound insulation effect, and light weight.