Filtering device used for chemical wastewater

The invention discloses a filtering device used for chemical wastewater. The filtering device comprises a first filtering pool, a gas discharge pipe, a purifier, a second filtering pool, a filtering device, a third filtering pool, a fourth filtering pool and a disinfectant fluid box, wherein the left side of a water inlet pipe is provided with the first filtering pool; a temperature control deviceis arranged at the top part of the interior of the first filtering pool; the second filtering pool is arranged at the right side of the interior of the first filtering pool; the interior of the second filtering pool is provided with an ultrasonic device; the left side of the second filtering pool is provided with the third filtering pool; the interior of the third filtering pool is provided withthe filtering device; the fourth filtering pool is arranged at the bottom side of the third filtering pool; and the disinfectant fluid box is arranged at the left side of the fourth filtering pool. The novel device provided by