The present invention discloses an advanced treatment method for grading and recycling industrial park wastewater after biochemical processes, which belongs to the technical field of the sewage treatment. The method comprises firstly, entering the industrial park wastewater after biochemical processes into cloth filter for treatment, and respectively entering the filter effluent of cloth filter into an O3 coupling biochar system and an artificial light coupling submerged plants purification pond for treatment in two paths, wherein the O3 coupling biochar system consists of a O3 oxygen pond and a biochar pond, and the outlet of the artificial light coupling submerged plants purification pond is communicated with a clean water pond through a valve; then drawing an appropriate amount of water from the recycling clean water pond to be transferred into a nanofiltration softening device, a softening water tank, a reverse osmosis device, a de-salting water tank, an electric desalting device and an ultrapure water tank, and finally sending the recycling clear pool, the softening tank, the de-salting water tank and the ultrapure water tank to the industrial park water consuming point by pipelines or water carts. A high recycling rate can be achieved, and water treatment costs can be significantly reduced, so that the method is worthy of being popularized.