The invention discloses a fuel nozzle. The fuel nozzle comprises a device body, a needle valve body and a needle valve driven by an electromagnetic valve; the needle valve body is fixed to the device body through a fastening cap; and the fuel nozzle is characterized in that a fuel cavity is formed among the needle valve, the needle valve body and the device body; a guide block is arranged in the middle portion of the needle valve, and a sliding face is formed between the guide block and the wall of the needle valve body; the fuel cavity is divided into a pressure storage chamber located on the head portion of the needle valve and a pressure balance chamber located on the rear portion of the needle valve through the guide block; a fuel inlet is located in the pressure balance chamber, and a differential pressure chamber is circumferentially arranged between the guide block and the wall of the needle valve body and is communicated with the pressure balance chamber; and the differential pressure chamber is communicated with the pressure storage chamber through a throttling hole. The fuel nozzle is suitable for multiple kinds of fuel such as gas and fuel oil and has the beneficial effects that an oil returning pipeline is not needed, jetting is table, sliding (jetting) resistance of the needle valve is small, fuel pressure fluctuation is small, the pressure storage chamber does not need to be machined on the needle valve body, the needle valve body and the needle valve are not in a matching part manner traditionally, the matching gap of the needle valve body and the needle valve is much larger than the matching gap of traditional matching parts, interchanging can be achieved, and machining is facilitated.