Sample material collecting system for sample preparation

The utility model provides a sampling material collecting system which comprises a first shell, a second shell, a third shell and a fourth shell, a first feeding port is formed in the top of the first shell, and a first discharging port is formed in the bottom of the first shell; the supporting plate is rotationally arranged in the first shell; the storage device comprises a charging barrel and a discharging assembly, the charging barrel is arranged on the supporting plate, the discharging assembly is arranged on a lower port of the charging barrel, and the discharging assembly is used for opening and closing the lower port of the charging barrel; the driving device is arranged on the first shell, the driving device is in transmission connection with the supporting plate, and the driving device drives the supporting plate to rotate, so that the upper end opening of the charging barrel is located below the first feeding opening, and/or the lower end opening of the charging barrel is located above the first dis