The utility model discloses a mixing agitating unit who contains surface -activeagent's pesticide emulsion, the agitating unit body is installed on the support frame, drive arrangement sets up the top at the agitating unit body, enter the right side of pencil setting at drive arrangement, flow metering device installs and is advancing the lower extreme of pencil, controlling means sets up the left side at drive arrangement, the (mixing) shaft is installed in the inner chamber of agitating unit body, the (mixing) shaft is connected with the drive arrangement transmission, the setting of stirring wing is on the (mixing) shaft, the defoaming blade is through welding and (mixing) shaft fixed connection, the viewing aperture sets up the left side top at the agitating unit body, drive arrangement and flow metering device are all through connecting wire and controlling means electric connection. This mixing agitating unit, have easy operation, mixing effectual, easily control characteristics such as liquid medicine addition, can improve stirring efficiency by a wide margin, promote product quality.