Automatic metering and bagging device and method for finished silica sand

The invention discloses an automatic metering and bagging device and method for finished silica sand. The device comprises a frame body, a storage bin, a double-air-cylinder integrated bagging valve, a ton bag, a platform scale and a weighing control system. The storage bin is arranged on the frame body, and the double-air-cylinder integrated bagging valve is installed below a discharging hopper of the storage bin through bolts. The double-air-cylinder integrated bagging valve is used for controlling discharging of the storage bin. The platform scale is placed right below the double-cylinder integrated bagging valve, and the ton bag is placed on the platform scale; the platform scale and the double-cylinder integrated bagging valve are electrically connected with the weighing control system respectively; the weighing control system is used for controlling the opening or closing of the double-cylinder integrated bagging valve; automatic weighing and bagging of finished silica sand can be achieved, manpower is