The invention discloses a sewage precipitation pool of a swinging rod dispersion precipitating agent. The sewage precipitation pool comprises a rectangular sewage precipitation pool, a swinging rod dispersion device and a dirt cleaning device, wherein a water inlet groove is formed in the upper part of the left end surface of the sewage precipitation pool; a water inlet is formed in the left sidewall of the sewage precipitation pool; a water overflow groove is formed in the upper part of the right end surface of the sewage precipitation pool; a water overflow opening is formed in the right side wall of the sewage precipitation pool; a plurality of downwards recessed isosceles trapezoid-shaped sludge hoppers with the wider upper side and the narrower lower side are uniformly formed in theleft and right direction of the upper end surface of the lower side wall of the sewage precipitation pool; a sludge falling groove is formed in the lower part of the lower side wall of the sewage precipitation pool; the sludge hoppers and the sludge falling groove are communicated through the material falling groove; swinging rods are arranged at the upper end of the sewage precipitation pool in ascattered way; the dirt cleaning device comprises a scarping plate and a sealing plate; the scraping plate is arranged in the sludge hopper in a front and back sliding way; the sealing plate can be used for opening and closing the material falling groove. The sewage precipitation pool has the advantages that the precipitating agents can be uniformly dispersed; the precipitation effect is good; through the combination of the scraping plate and water washing, the dirt cleaning effect is good.