The invention discloses a pitch spraying amount testing method and device.The method comprises the steps that a container with the specified containing area is arranged on the road surface where pitch needs to be sprayed, a weighing device is arranged on the container, efficient and rapid weighing is achieved, a sample collecting barrel for storing the weighed pitch is arranged below the container, a spraying system is connected to the sample collection barrel, and the spraying system is utilized for spraying the collected pitch to the road surface below the container.A conventional pitch spraying amount detecting method and national standards are broken through for the first time, the method and device capable of achieving in-situ weighing and evenly spraying the weighed pitch to the original area are provided, the whole testing working procedure and flow are simplified, the efficiency is improved, and the filling working procedure for pitch in a detection area in the later period can be omitted.