The utility model discloses an intelligent substation low-voltage busbar protection system, which comprises a busbar protection device (1), a station control level network switch (2) protection measurement and control units (3) of branches, wherein each protection measurement and control unit (3) comprises a plurality of protection measurement and control devices which are connected with a busbar, and the busbar protection device (1) is connected with each of the protection measurement and control devices through an internet access and the station control level network switch (2); and the plurality of protection measurement and control devices connected with the busbar comprises a sectional switch protection measurement and control device, a line interval protection measurement and control device, a grounding transformer interval protection measurement and control device, a main transformer interval protection measurement and control device and a capacitor interval protection measurement and control device. The intelligent substation low-voltage busbar protection system does not need to arrange network switches additionally, the protection measurement and control devices of each branch do need to arrange internet accesses additionally, the intelligent substation low-voltage busbar protection system can effectively reduce the usage amount of secondary cable, removes faults of busbars with voltage class of 35 kV or below quickly and accurately, and is convenient and fast in installation and maintenance.