Molybdenum-rhenium alloy is formed by adding different contents of element rhenium into molybdenum. Molybdenum and rhenium are both refractory metals. By combining the two elements, molybdenum-rhenium alloy can have high-temperature physical properties of rhenium, and good mechanical properties of molybdenum, thus having born excellent performance. Its rolling deformation degree can be up to 90%. By adding 47.5% or 41% rhenium into molybdenum to form molybdenum-rhenium alloy (nominal composition 50%Mo+50%Re), its ductility, weldability and formability are greatly improved. Even at high temperatures, molybdenum-rhenium alloy can maintain its good ductility. Molybdenum-rhenium alloy is widely used in the electronics industry, the nuclear industry and the aerospace industry.