▎ 摘　　要

NOVELTY - The device has a grinding mechanism is provided with a particle precision processing mechanism. A microwave ultrasonic combined reaction mechanism is used for providing a material reaction environment. A drying mechanism dries reacted liquid material. The grinding mechanism is used for grinding liquid material after drying. The particle precision treatment mechanism is configured to process non-standard particle material to reach standard. A first reaction container and a microwave generator are fixed on a baffle plate. USE - Preparation device for producing preform additive by graphene material for civil engineering. ADVANTAGE - The device effectively improves strength and rapid-drying effect of tubular pile cement concrete and cement concrete rational index of a precast product, achieves that concrete manufactured by modified cement is compressive and anti-folding, increases index, effectively separates large particle material and standard particle material, which does not reach standard in a grinding process, and reduces energy consumption of a device main body. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing additive by using a preparation device. DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of a preform additive preparation device.