The utility model discloses a feeder hopper sealing device of concrete mixing transport vechicle, the feeder hopper setting of this concrete mixing transport vechicle is in the top of a hopper, and this feeder hopper sealing device is including rotatory apron, rotation axis and slowspeed machine, wherein, rotatory apron sets up in the feed inlet top of feeder hopper, and the slowspeed machine setting is on a hopper, and the output shaft of slowspeed machine is continuous with the one end of rotation axis, and the other end of rotation axis links to each other with the peripheral of rotatory apron, and during operating condition, through slowspeed machine drive axis of rotation, axis of rotation drives the feed inlet that rotatory apron is used for opening or closing the feeder hopper. During the use, the start -up of driver's control motor and stopping to realize opening and being closed of rotatory apron, played the effect of sealed feeder hopper. In the engineering of concrete mixing transport vechicle transportation material, the utility model discloses reducible jar of internal evaporation of water prevents that rainwater and other impurity from getting into a jar body to the quality of concrete has been guaranteed.