Furazano[3, 4-e]-1, 2, 3, 4-tetrazine-1, 3-dioxide(FTDO) was investigated by theoretical methods. Its optimized geometry structure, IR spectrum, and heat of formation were calculated using density functional theory with B3LYP/6-31+G(d, p) level and G2 method. The density and oxygen balance of FTDO were also estimated theoretically. The density is 1.860 g·cm^-3, oxygen balance is -10.25%. The heat of formation of FTDO is 661.0 kJ·mol^-1. The explosion parameters of FTDO were calculated and compared with that of HMX. The specific volume of explosion, detonation velocity, and detonation pressure of FTDO are 718 L·kg^-1, 9493 m·s^-1, and 40.76 GPa respectively. Except for the density and specific volume of explosion, all of other properties of FTDO are better than those of HMX.