An automatic crucible dumping and cleaning system for electronic kilns belongs to the technical field of accessory facilities for electronic kilns. The automatic crucible dumping and cleaning system comprises a box underframe, a receiving box, a material discharge mechanism, a pair of door opening and closing mechanisms, a crucible-holding mechanism, a power transmission mechanism and a top cover; the receiving box is fixed on the box underframe, one side of the upper part of the receiving box is provided with a crucible inlet, and the other side of the upper part of the receiving box is provided with a crucible outlet; the material discharge mechanism is connected with the bottom of the receiving box; the door opening and closing mechanisms are arranged on the box underframe, one of the door opening and closing mechanisms corresponds to the crucible inlet, and the other door opening and closing mechanism corresponds to the crucible outlet; the crucible-holding mechanism is supported on the wall of the receiving box; the power transmission mechanism is fixed on the box underframe, and is connected with the crucible-holding mechanism; the top cover is fixed on the box underframe and corresponds to the open part of the top of the cavity of the receiving box, and a group of blowing tube connectors are arranged on the top cover, and are connected with an air source device. The automatic crucible dumping and cleaning system has the advantages that: the working intensity of workers can be decreased, and moreover, the dumping and cleaning efficiency can be increased; the cleaning quality can be guaranteed; and the environment of a working site cannot be polluted.