In order to study the electrical ignition properties of HAN-based liquid propellant,an experimental device of electrical heating ignition of liquid propellant droplet was designed. By using high speed camera system,the ignition properties of LP1846 single droplet was observed at different electrical heating rates. The results show that when the LP1846 droplet is electrified,it goes mainly through four characteristic processes,i.e. evaporization process,periodic expansion and contraction process,stronger thermal decomposition process,and ignition and combustion process. When peak load voltage is from 80 V·s^-1 to 140 V·s^-1,the ignition delay time of LP1846 droplet is linearly shorten from 0.82 s to 0.62 s,but the flame is lighter.