Abstract: The distribution performance, liquid drop size, the inlet pressure change and entrainment of the LSXPT-1 type dual direction liquid spray nozzle were studied in air-H2O system by synthetic glass tower (ID1000mm) device. The results indicate that its distribution non-uniformity coefficient are between 0.031-0.040, 40% lower than that of the conventional trough-type liquid distributor as well as the buffer sedimentation-type liquid distributor, exhibiting excellent distribution performance. With increase of liquid flow rate, the nozzle inlet pressure increases. The pressure can reach to 0.04-0.66 MPa and the liquid drop size from dual-direction liquid spray nozzle is between 1 975-2 350 μm in the flow rate range of 2.15-9.62 m3/h, much higher than the size of 400-700 μm, required for the liquid droplet settling at gas-liquid flow in turbulent state when gas velocity between 3.0-4.0 m/s. Results show that the entrainment quantity is still less than 7% when the empty tower velocity is as high as 4m/s. Thus the new nozzle can increase the tower’s upper limit of operating gas velocity and the processing capacity.