Experimental research was conducted on the fuel spray characteristics of conical atomizing nozzles in an integrated afterburner, analyzing the effects of transverse flow velocity and fuel supply pressure difference on the macroscopic and microscopic characteristics of the spray. Through LIF/Mie technology, it was found that the spray morphology of the conical atomizing nozzle was dominated by Rayleigh-Taylor and Kelvin-Helmholtz instability phenomena. The atomization effect at the top of the spray was good, but it was significantly affected by the transverse flow. Increasing the fuel supply pressure difference could increase the spray projection area and droplet velocity, but it would lead to an increase in droplet size. Increasing the transverse flow velocity to 30 m/s could reduce the droplet size to below 60 μm. In addition, although the baffle structure increased the droplet size, it broadened the spray distribution range.