The utility model discloses a device for plastic granules automatic material conveying, this device are arranged in adding the labor and materials cabin with what the extruder was added to raw material tank's raw materials, and this device includes the fan of inhaling that top-down connected gradually, the storehouse that gathers materials, and stirring storehouse and ration meter, inhale a fan through a hose with raw material tank is connected, said ration meter still with the said entry that adds the labor and materials cabin is connected, just said ration meter with stirring storehouse and first with still being equipped with respectively between the labor and materials cabin, the second valve. The utility model discloses an inhaling the raw materials of a fan in with raw material tank and sucking the storehouse that gathers materials, the raw materials in the storehouse that gathers materials falls into the stirring storehouse, utilizes stirring bodies stir raw materials, makes the mix of raw materials more even, simultaneously, gets into the raw materials that adds the labor and materials cabin through the measurement of ration meter, guarantees at every turn that the inlet keeps evenly, and obtain controlling the process time of messenger's extruder, has effectively improved production efficiency