With　the　advent　of　SG　and　the　evolution　of　Internet　protocols,　the　industrial　internet　is　driving　the　need　for　deterministic　Quality　of　Service　(Qos)　guarantees.　Recent　researches　have　leveraged　Cyclic　Queuing　and　Forwarding　(CQF)　mechanism　to　achieve　the　deterministic　transmission　in　Time-sensitive　Networking　(TSN).　However,　most　of　them　are　difficult　to　implement　in　Large-scale　Deterministic　Networks　(LDNs)　due　to　long　link　propagation　latency　and　global　time　synchronization.　In　this　paper,　we　design　large-scale　deterministic　network　flow　shaping　mechanism　(LFS),　a　simple　yet　effective　solution　to　guarantee　deterministic　worst-case　latency　and　zero　packet　loss　for　time-sensitive　(TS)　flows　in　LDNs.　Based　on　Cycle　Specified　Queuing　and　Forwarding　(CSQF)　mechanism　of　multi-queue　circular　forwarding,　LFS　specifies　the　start　time　for　TS　flow　injected　into　the　Wide　Area　Network　(WAN)　to　improve　the　bandwidth　resource　utilization　and　mitigate　the　impact　of　additional　delays　caused　by　flow　convergence.　Compared　with　the　solution　without　using　the　LFS　mechanism,　experimental　results　demonstrate　that　LFS　had　better　schedulability　and　resource　utilization　while　enabling　bounded　latency　for　LDNs.