The utility model discloses a be used for producing energy -saving automatic compounding stirred tank of water -reducing agent, which comprises a housin, the left top of casing intercommunication hasthe inlet pipe, the top of inlet pipe is provided with the feed valve, the bottom intercommunication of casing has the discharging pipe, the right side of discharging pipe is provided with the bleedervalve, two heating bases of the equal fixedly connected with in both sides of shells inner wall. The utility model discloses a set up the motor, the main shaft, the transmission case, first stirringleaf, branch, the activity post, the gear, the gear groove, the connecting rod, second stirring leaf, the cooperation of pivot and third stirring leaf is used, solved current compounding stirred tankonly a motor drive puddler rotate the compounding, it is poor to mix the effect, and the reaction time is long, the problem of a large amount of electric energy has been wasted, this be used for producing energy -saving automatic compounding stirred tank of water -reducing agent, possesses energy -conserving advantage, good mixing effect, and the reaction time is short, a large amount of electricenergy has been saved, and thus usage by users is facilitated.