Password service channel system based on network isolation and construction method

The invention discloses a password service channel system based on network isolation, relates to the technical field of network security, and aims at the current situation that data leakage and data theft are frequent and ceaseless, and adopts the technical scheme that the password service channel system comprises a network physical isolation component, a domestic main control platform and a password service component, wherein the network physical isolation assembly comprises an embedded processing platform I and an FPGA chip, the embedded processing platform I is responsible for automatically loading an FPGA after startup and synchronizing a network isolation strategy to the FPGA, the FPGA receives external network data, and the external network data is sent to the domestic main control platform after being filtered by the network isolation strategy; the domestic main control platform is responsible for formulating and issuing a network isolation strategy, analyzing network data and calling a password servic