Recycled coarse aggregate modification device

The invention relates to the technical field of constructional engineering, and discloses a recycled coarse aggregate modification device which comprises a reaction container, a material injection pipeline, a discharging pipeline, a negative pressure generation device and an inner container, a barrel body is connected with a top cover to form a reaction cavity, and chemical slurry for modification enters the reaction container through the material injection pipeline and is discharged through the discharging pipeline. The chemical slurry is discharged out of the reaction container through the discharging pipeline after the strengthening treatment, and the negative pressure generation device performs negative pressure treatment on the interior of the reaction container, so that the chemical slurry can more comprehensively and quickly enter the micro-cracks of the recycled coarse aggregate under the action of the air pressure difference; the inner container is detachably arranged in the cylinder body, and the wa