Weighing and filling device and material preparation system

The embodiment of the utility model provides a weighing and filling device and a material preparation system, and relates to the field of material preparation. The weighing and filling device comprises a conveying part, a filling part and a weighing part, wherein the weighing part is embedded in the conveying part, the conveying part is used for conveying and bearing a tank body, the filling part comprises a support and a filling head, the filling head is telescopically connected to the support, and the filling head is used for filling the tank body with materials. According to the weighing and filling device, the filling head which can stretch out and draw back relative to the support is arranged, so that tank bodies with different heights can be conveniently filled with materials, and the situation that the materials are splashed out due to the fact that the distance between the filling head and the tank bodies is long is avoided. And the weighing part is embedded in the conveying part, so that the moving s