Reutilization device and utilization method for washing after micro-etching

The invention belongs to the technical field of surface treatment, and particularly relates to a reutilization device for washing after micro-etching. The device sequentially comprises an oil removal cylinder, a post-oil-removal washing cylinder, a micro-etching cylinder and a post-micro-etching washing cylinder from left to right, and further comprises an overflow pipe; the upper end of the overflow pipe is communicated with the post-micro-etching washing cylinder, and the lower end of the overflow pipe is communicated with the post-oil-removal washing cylinder; the overflow pipe is installed in an inclined mode, and the end, communicated with the micro-etching post-washing cylinder, of the overflow pipe is high; the micro-etched washing cylinder is also communicated with a water adding port. According to the reutilization method for washing after micro-etching, the overflow pipe is additionally arranged, clear water is introduced into the post-micro-etching washing cylinder through the water adding opening,