The invention discloses erbium and terbium co-doped fluoride halide phosphate laser glass which comprises components in percentage by mole as follows: 15% to 20% of Ba(H2PO4)2, 15% to 20% of Mg(PO3)2, 5% to 10% of AlF3, 10% to 20% of BaF2, 15% to 30% of MgF2, 20% to 30% of NaX, 1% to 5% of ErF3 and 4% to 10% of TbF3, wherein X is a combination of any one or more of F, Cl, Br and I. The fluoride halide phosphate laser glass is transparent and free of crystallization, the infrared transmittance is high in an area nearby 3 mu m, physical and chemical properties are excellent, the laser glass can be applied in a 3 m fiber laser and can be hopefully applied to defense industry, military and civilian areas.