The utility model discloses a concrete mixing device, including first stirring chamber, first stirring chamber includes the base, is equipped with first shell on the base, still is equipped with the second shell on the base, first stirring chamber top still is equipped with the apron, is equipped with an agitator motor on the apron, and agitator motor below is connected with first (mixing) shaft,and first (mixing) shaft below circumferencial direction evenly is equipped with three first puddlers, and first puddler front end is equipped with the 2nd agitator motor, and the 2nd agitator motor below is connected with the second (mixing) shaft, is equipped with three second puddlers on the second (mixing) shaft. The utility model discloses a first, second puddler and setting first, the 2nd agitator motor make the utility model discloses can get concrete mixing more fully as requested, setting through second stirring chamber for the stirring is accomplished and later can shifted out it come, fully pours the concrete and avoids causing the waste of raw materials and concrete stirring the solidification of intracavity portion, and the practicality in chamber is stirred in the influence.