The invention discloses a low-consumption catalytic separation 
wastewater treatment method which comprises the following steps: 1) enabling 
wastewater to pass through a 
grating well and an 
oil separation tank, and separating suspended matters; 2) dissolving active gas in water to generate gas-dissolved water; 3) performing demulsification treatment; 4) performing 
settling treatment; (5) introducing dissolved 
air water into the air floatation tank, and releasing fine bubbles to enter the 
wastewater, so as to realize primary separation of the wastewater; 6) carrying out 
biodegradation; 7) decomposing in an 
ozone tank to obtain oxygenolysis water; 8) performing oxidation treatment; 9) performing demulsification treatment; 10) filtering the wastewater obtained by 
sedimentation treatment through a filtering device, and discharging the filtered wastewater into a collecting tank; according to the method, gas activated by an 
electric field is used as a gas source, dissolved gas water is generated and released into 
sewage, fine bubbles are generated, the demulsification effect is achieved, the net capturing effect is good, 
colloid instability is promoted, agent consumption is reduced, the purpose of enhancing separation of emulsified substances, 
suspended solids and water is achieved, the 
sludge yield is reduced, and the agent content in 
sludge is reduced.