The invention relates to a hexavalent chromium- and ammonia nitrogen element-containing vanadium and titanium production wastewater treatment device, and provides a vanadium and titanium industrial wastewater treatment device, which can make hexavalent chromium, ammonia nitrogen, chemical oxygen demand (CODcr), pH, suspended matters, chroma, and biochemical oxygen demand (BOD) generated in the vanadium and titanium production wastewater meet standards and discharged. The device is provided with a grate, an adjusting tank, a first dosing box, a second dosing box, a third dosing box, a sedimentation tank, a vertical flow sedimentation tank, a first inclined tube sedimentation tank, a second inclined tube sedimentation tank, a first water pump, a second water pump, a third water pump, a fourth water pump, a fifth water pump, a sixth water pump, a recoil pump, a slurry pump, an intermediate water tank, an aeration tower, an air blower, a dosing water tank, a double filtration tower, a filter press, a screw pump, a sludge concentration tank, a sludge pump and the like. The wastewater containing overproof hexavalent chromium, ammonia nitrogen elements, CODcr, pH, suspended matters, chroma, and BOD in the vanadium and titanium production process is subjected to homogeneous adjustment, acid-alkali neutralization, solution sedimentation, biochemical reaction, aeration for ammonia removal, double filtration, sludge concentration, pressure filtration for dehydration and the like; and the treated sludge is transported outwards, and the treated wastewater meets standard to be discharged or recycled.