A intermediate alloy of aluminum, titanium, carbon and Yt and method for manufacturing same relates to a grain refiner for electron alloys thinning processing and with enhanced mechanical performances, belongs to the field of metallic material design and fabricating, and is characterized by its chemical components (based on the mass percentage, wt%) as follows: Ti 0.50-6.00, C 1.00-10.00, Y 0.10-3.00, and the allowance is Al, wherein the as-cast structure is characterized by a four-phase complex tissue of alpha-Al, Al3Y, TiC and Al4C3, with the chemical compounds granules of Al3Y, TiC and Al4C3 distributed homogeneously on the alpha-Al basal body.Said intermediate alloy of aluminum, titanium, carbon and Yt is very suitable for grain refiner of electron alloys and possesses very wide market application foreground due to its simple preparing process, low cost of manufacture and capability of mass industrial production.