A spray nozzle for providing a high efficient atomization and a uniform fluid flow pattern, includes an internal fluid channel, sealing and a spray nozzle, on which two of spray orifices are designed close to each other. The fluid flow is guided in the internal fluid channel smoothly and separated to two fluid flows inside of spray nozzle. These two fluid flows are pressed out from the spray orifices and interfered with each other right after flow out from the spray orifices. The fluid is being atomized efficiently because the spray nozzle is designed to fully utilize both flow velocity energy and flow pressure potential energy, which is well known as “Potential Core” or “Potential Zone” and will disappear in a very short distance right after fluids flow out from the spray orifices. During the fluid flows collide with each other by using the flow velocity right after flow out from the orifices, the fluid flows explode within the potential core by using the flow pressure potential energy. And then, the fluid flow and the fluid particles are continuously atomized by using the velocity difference between the fluid flow and the air around the fluid flow to have very fine particles.