1,5-Diazabicyclo[3.1.0] hexane (DABH) was found a potential hypergolic liquid propellant. The physical and energetic properties of DABH, 2-(dimethylamino) ethyl azide (DMAZ), and monomethyl hydrazine (MMH) were compared. The ignition delay time of DABH with nitrogen tetroxide was 1 ms, which was shorter than DMAZ and similar with MMH. The toxicology experiment showed that half lethal dose (LD50) of DABH was 621.0 mg kg(-1), which suggested that DABH was promising to be used as low-toxic liquid propellant. Thermal decomposition experiments showed that the apparent activation energy (E) was about 66.3 kJ mol(-1). The thermal decomposition calculated results from Madhusudanan-Krishnan-Ninan integration, Satava-Sestak integration and Achar differential methods were compared and the pre-exponential factor were obtained.