Aiming　to　the　new　problems　of　cost　optimization　for　concurrent　multiple　DAG(Directed　Acyclic　Graph)　workflow　sharing　heterogeneous　resource　on　the　basis　of　maximizing　overall　throughput　of　DAGs　scheduling,　we　propose　an　algorithm　called　PDTC(based　on　the　Probe　of　the　Total　Cost　Decrease)　to　minimize　the　total　cost　of　these　DAG　while　meeting　a　user-defined　deadline.　Last　experiments　demonstrate　that　these　algorithms　and　methods　can　improve　the　related　performances.　©,　2014,　Chinese　Institute　of　Electronics.　All　right　reserved.