Abstract: The heavy organic concentration food-wastewater in Hanzhong was treated with a wastewater continuous treatment apparatus.In the apparatus, the walnut shell activated carbon was used as adsorption filler and the ultrasonic was used as an adjunct.The experiment process had investigated the ultrasonic power, ultrasonic frequency and the inlet velocity of wastewater in the treatment of food- wastewater.Results showed that, the optimum operating conditions of the process were as follows: the ultrasonic power was 90W, the ultrasonic frequency was 30kHz, the inlet velocity of wastewater was not higher than 10cm /min and the flow rate of condensate in condensing tube was 10L /min.As the inlet velocity of wastewater was 10cm /min, the removal rates of COD, BOD, NH+4-N and SS were 86.3%, 57.2%, 63.6% and 93.8%.The biodegradability index ( BOD /COD) was increased from 0.232 up to 0.724.