The invention discloses a connecting structure for a single-component high-temperature alloy injector and a ceramic spray pipe. The connecting structure comprises an injection panel, a flexible graphite washer, a semicircular ring, screws, a spring washer, a flat washer, a sealing pressing ring and the ceramic spray pipe, wherein the injection panel is connected with the injector; the ceramic spray pipe is sleeved with the flexible graphite washer; one end face of the flexible graphite washer is attached to the injection panel, and the other end face of the flexible graphite washer is attachedto the ceramic spray pipe; the top end of the ceramic spray pipe is attached to the injection panel; the outer surface of the ceramic spray pipe is sleeved with the semicircular ring; one end face ofthe semicircular ring is attached to the ceramic spray pipe, and the other end face of the semicircular ring is attached to on need face of the sealing pressing ring; the outer surface of the ceramicspray pipe is sleeved with the sealing pressing ring, the spring washer and the flat washer; the screws penetrate through the spring washer, the flat washer and the sealing pressing ring in sequenceto be in threaded connection with the injection panel. Through the connecting structure for the single-component high-temperature alloy injector and the ceramic spray pipe, the problem existing in reliable connection of a metal injector with a dissimilar material of the ceramic spray pipe is solved.