The utility model relates to a production carboxylic styrene butadiene latex's novel agitating unit, including main shaft and stirring main part, the vertical setting of main shaft, the stirring mainpart is installed on the main shaft, the stirring main part includes that a plurality of L types stir the body, and each L type stirring is personally experienced sth. Part of the body including a horizontal agitating rod of level setting and a vertical stirring leaf of vertical setting, and vertical stirring leaf sets up in horizontal agitating rod's end, and vertical stirring leaf is the heliciform, and one side of horizontal agitating rod is equipped with concave arc -shaped groove to the indent, forms a convex arc shape portion in the opposite side, install a fan -shaped agitating unit onthe main shaft, fan -shaped agitating unit is located stirring main part downside, and fan -shaped agitating unit includes sector section and meander line portion, and sector section's both ends are connected respectively at the both ends of meander line portion, and meander line portion has convex part and concave part that a plurality of intervals in proper order set up. Production carboxylic styrene butadiene latex's agitating unit can reach very good stirring effect through above -mentioned structure, can effectual improvement production efficiency.