Automatic feeding system of FDM (frequency-division multiplexing) printing equipment

The invention provides an automatic feeding system of FDM (frequency-division multiplexing) printing equipment. The automatic feeding system comprises a printing extrusion mechanism, a printing cartridge hopper mounted at the upper part of the printing extrusion mechanism, a photoelectric detection device electrically connected with the printing cartridge hopper to detect a material level of the printing cartridge hopper, a charging cartridge selectively communicated with the printing cartridge hopper and a material bucket, a weighing sensor electrically connected with the charging cartridge to detect material weight in the charging cartridge, and a control system, wherein the control system charges the printing cartridge hopper via the charging cartridge and the charging cartridge via the material bucket based on a material level detection signal emitted by the photoelectric detection device and a material weight signal emitted by the weighing sensor. The automatic feeding system of the FDM printing equipmen