Abstract: An experimental investigation in the icing wind tunnel YBF-04 has been conducted to measure the icing cloud uniformity and liquid water content (LWC) distribution in the test section. An icing grid and a multi-cylinder equipment are both used in the experiments as the measurement instruments, in which the multi-cylinder can be operated under two states, rotating and stationary. As for the three measurement techniques, the experimental icing conditions are all the same, including the airflow speed and temperature, as well as the spray air and water pressure. According to the ice accretion on the icing grid, the cloud uniformity in the test section can be observed directly while the LWC value can be calculated by the measured ice thickness. In the same way, the multi-cylinder equipment also can be applied to measure the local LWC at the centerline of the test section. The experimental results show that, the icing cloud is mainly concentrated in 75% area of the test section but the uniformity still needs to be improved because of the droplet settling and nozzle clogging. In addition, when the ice accretion occurs on the icing grid surface, the blockage ratio of the icing wind tunnel will increase with time, which can lead to the significant change of the airflow parameters, as well as the greater measurement error. But the effect during the multi-cylinder experiments is smaller and negligible. Thus, the measurement of LWC distribution has higher accuracy by using multi-cylinder equipment.