The invention discloses a vacuum coating method for indexes of a dial plate of a watch, and relates to the technical field of watch machining. The vacuum coating method comprises the following steps that preparation work is done before startup, and equipment, water, gas and the like are in a normal standby state or not is checked; a vacuum machine is started, after the system main electricity of the vacuum machine is electrified, a control cabinet power supply indicator lamp of the vacuum machine is turned on, a power button on a control cabinet door panel is controlled to be pressed down, thecontrol system is powered on, and meanwhile, a button indicator light is turned on, and an emergency stop button is restored to be in the bouncing state; the vacuum machine is controlled to vacuumizethrough a touch screen on the control cabinet; after the vacuum machine body is vacuum, and the temperature reaches the expected requirement of the production process, a throttle valve is adjusted, and the air inlet of a mass flowmeter is adjusted, so that the pressure intensity in a vacuum chamber meets the working requirements, and coating is carried out according to the technological requirements under the condition that the wiring of the vacuum machine is correct and the load is not short-circuited. The problem that the film coating of the dial plate is not flat is solved, the surface ofthe dial plate can be uniformly coated, and the surface of the dial plate is smoother.