A process was studied to make continuous silicon carbide fiber from polycarbosilane (PC) served as precursor. The manufacture process includes the synthesis of PC，and melt spinning in an equipment with a nozzle of 100 holes to produce 10-15μm diameter fibers. These fibers were cured single ply yarn, and were coutinuously pyrolyzed to 1200℃ in an inert environment. They then undergo siziug，dry and drum reel to produce amorphous high performance ceramic fiber. The fibers have a tansile strength of 2-2.3GPa and an elastic moduli of 178GPa. Their length>100m. The effect between structure and properties of SiC fiber made by various technical parameters has been studied in this paper.