The invention discloses a method for preparing a plate-shaped full-ceramic coated fuel core block through integral molding and aims to solve the problems that conventional FCM (Full-Ceramic Micro) fuel preparation has tedious steps, is hard in engineering application, hard in co-burning of the fuel with SiC substrate ceramics in a non-fuel zone, non-uniform in TRISO granule in the preparation process, hard in non-fuel zone preparation and the like. The method comprises the following steps: (1) respectively preparing a SiC/TRISO composite raw zone and a single SiC raw zone; (2) preparing a rawblank of an upper layer structure, a middle layer structure and a lower layer structure, wherein the upper layer structure and the lower layer structure are both single SiC raw zones more than one layer, and the middle layer structure is a SiC/TRISO composite raw zone more than one layer; (3) performing isostatic cool pressing and degumming treatment on the raw blank so as to obtain a half finished product; and (4) sintering the half finished product, thereby obtaining a finished product. The method has the advantages of being simple in production process, low in cost, short in production cycle, applicable to industrial production and the like.