The invention provides a sewage processing network by taking the laser processing apparatus as node. The sewage processing network comprises several laser processing apparatus, several communication terminals and a monitor center, the laser processing apparatus comprises a water inlet case, a communication pipeline is arranged at the bottom of the water inlet case, an active carbon adsorption groove is arranged at the bottom of the communication pipeline, a magnetic force disc is arranged at one side of the active carbon adsorption groove, a scraper is arranged at one side of the magnetic force disc, a mud storage groove is arranged at one side of the scraper, an extraction pump is arranged at one side of the mud storage groove, a ultrasonic grinding groove is arranged at one side of the extraction pump, a laser disinfection groove is arranged at one side of the ultrasonic grinding groove, a laser emitter is arranged in the laser disinfection groove, an ultraviolet ray emitter is arranged at one side of the laser emitter, and a clear water collector is arranged at one side of the laser disinfection groove. Through the laser emitter and the ultraviolet ray emitter, pathogen and virus are killed, the sewage can be efficiently processed, and the disinfection is thoroughly carried out.