The drop state of the ink-jet ink is an important factor that influences the ink-jet imaging quality, nozzle characteristics and parameters have a great influence on the final drop state. In order to meet the requirement of printing quality, prepare UV ink-jet ink is appropriate for XAAR, and printing under different voltage and ignition frequency, observe and analysis the drop state under different ink-jet condition. The result shows that it's existed a large differences of the drop state including drop speed, drop volume and drop tail length when the UV ink-jet inks under different voltage and ignition frequency, there is a certain relationship between control parameters of the nozzle and the ink's drops state.