The invention belongs to the technical field of injectors, and particularly relates to a novel dual-fuel in-cylinder direct-injection injector. The novel dual-fuel in-cylinder direct-injection injector comprises an injector housing, a natural gas solenoid valve, a diesel oil solenoid valve and a valve body, wherein the natural gas solenoid valve, the diesel oil solenoid valve and the valve body are arranged on the injector housing; a joint of the valve body and the injector housing is equipped with an intermediate; a needle valve and a gas valve are arranged in the valve body; a high-pressurejoint, a gas inlet joint and a diesel oil return channel are arranged on the injector housing; a natural gas spray hole is formed in the valve body; and a diesel oil spray hole is formed in the gas valve; and a three-way valve structure is adopted to control a control cavity of the gas valve, so that response speed is increased. The novel dual-fuel in-cylinder direct-injection injector has the beneficial effects that sensitivity is great, independent control and independent injection on diesel oil and natural gas dual fuels can be simultaneously realized, the response speed of the injector isincreased, control precision is high, control on two fuels of diesel oil and natural gas can be realized, and wide use, in a heavy-duty car, of natural gas is realized.