NOVELTY - Device for short-range denitrification biological treatment of high-salt wastewater comprises sequential batch reactor (SBR), water distributing tank, and formaldehyde storing pool. The formaldehyde storing pool is provided with a peristaltic pump and connected with the SBR by a formaldehyde conveying pipeline. An aeration pump is sequentially connected with an aeration pipeline, rotor flow meter, and aeration head, which is protruded into the bottom of the SBR. A heating temperature control device and a stirring impeller are installed in the SBR.    USE - Device for short-range denitrification biological treatment of high-salt wastewater (claimed).    ADVANTAGE - The device is capable of stably treating high-salt wastewater at high efficiency; performs denitrification biological treatment without desalting and salinity dilution; and overcomes the problem of long and unstable starting period in fresh water microorganism salinity domestication method. Because stable short-range denitrification is achieved, the treatment cost is further reduced and treatment efficiency is improved, while assuring the safety and stability of water quality. The operation energy consumption and cost are saved.    DETAILED DESCRIPTION - Device for short-range denitrification biological treatment of high-salt wastewater comprises SBR, water distributing tank, and formaldehyde storing pool. The water distributing tank is provided with lifting pump and connected with SBR by water inlet tube. The formaldehyde storing pool is provided with a peristaltic pump and connected with the SBR by a formaldehyde conveying pipeline. An aeration pump is sequentially connected with an aeration pipeline, rotor flow meter, and aeration head, which is protruded into the bottom of the SBR. A heating temperature control device and a stirring impeller are installed in the SBR. The stirring impeller is connected with a stirrer outside the SBR. One side of the SBR is provided with a water discharging valve. The bottom of the SBR is provided with a discharging valve. The lifting pump, peristaltic pump, aeration pump, and stirrer are respectively controlled by a timer by a connecting line. An INDEPENDENT CLAIM is included for short-range denitrification biological treatment of high-salt wastewater comprising:    (A) inoculating the slurry in SBR; and assuring the volatile solid density in the SBR to be greater than 1000 mg/L;    (B) washing the inoculated slurry until the solid density is lower than 5000 mg/L; depositing for 30-60 minutes until the slurry is totally deposited; stabilizing the slurry and water interface; opening the water discharging valve; and discharging the supernatant;    (C) adding the actual sewage in the water distributing tank and placing wastewater with 2.8-3.3% salinity as the original water of reactor;    (D) guiding the sewage with predetermined salinity from the water distributing tank to the SBR by the water inlet pipeline through the lifting pump; controlling the lifting pump by the timer; and achieving the water feeding phase within the time set by the timer;    (E) starting the timer for controlling the aeration pump; conveying the compressed air into the aeration head by the aeration pipeline by the aeration pump; dispersing gas into small bubbles by the aeration head, where gas supply speed is controlled by the rotor flow meter; and achieving aerobic nitrification phase within the time set by the timer;    (F) starting the timer for controlling the peristaltic pump; conveying the formaldehyde in formaldehyde storing pool to the SBR through the formaldehyde conveying pipeline; and turning off the timer after the set time;    (G) starting the timer for controlling the stirrer; driving the stirring impeller to stir the mixture of slurry and water; and completing the denitrification phase within the set time; and    (H) turning off the timer; stopping the stirrer; completing the deposition within the set time; after reaching to the set deposition time, according to the height of the slurry water level, opening the water discharging valve above the interface of the active slurry interface; and discharging the supernatant.