In　cryptographic　applications,　super　long　integer　operations　are　often　used.　However,　cryptographic　algorithms　generally　run　on　a　computer　with　a　single-core　CPU,　and　the　related　computing　process　is　a　type　of　serial　execution.　In　this　paper,　we　investigate　how　to　parallelize　the　operations　of　super　long　integers　in　multi-core　computer　environment.　The　significance　of　this　study　lies　in　that　along　with　the　promotion　of　multi-core　computing　devices,　and　the　enhancement　of　multi-core　computing　ability,　we　need　to　make　the　basic　arithmetic　of　super　long　integers　run　in　paralleling,　which　means　blocking　super　long　integers,　running　all　data　blocks　on　multi-core　threads　respectively,　converting　original　serial　execution　into　multi-core　parallel　computation,　and　storing　multi-thread　results　after　formatting　them.　According　to　experiments　we　have　observed:　if　scheduling　thread　time　is　longer　than　computation,　parallel　algorithms　execute　faster;　on　the　contrary,　serial　algorithms　are　better.　On　the　whole,　parallel　algorithms　can　utilize　the　computing　ability　of　multi-core　hardware　more　efficiently.