The invention relates to a sealing structure for an intelligent well downhole flow controller. The sealing structure comprises an upper valve body, a lower valve body, an inner sliding sleeve, a sealing base, a metal sealing assembly and a sealing ring. A plurality of throttling holes are formed in the side wall of the upper valve body, the lower valve body is fixedly connected to the lower end ofthe upper valve body, and the sealing base is fixedly connected to the inner side of the lower valve body. The metal sealing assembly is arranged on the inner side of the lower valve body and locatedbetween the lower end face of the upper valve body and the upper end face of the sealing base, and the metal sealing assembly and the upper valve body jointly constitute a channel allowing the innersliding sleeve to slide up and down; the metal sealing assembly comprises a first sealing ring and a second sealing ring matched with the first sealing ring; the first sealing ring adopts a K-shaped metal sealing ring, the second sealing ring is a nonmetal elastic sealing ring, the section of the second sealing ring is in a wedge shape, and the second sealing ring is mounted in a wedge-shaped space located at the top of the K-shaped metal sealing ring; and sealing rings are arranged between the lower valve body and the upper valve body, between the lower valve body and the metal sealing assembly as well as between the sealing base and the lower valve body correspondingly.