The invention provides a multi-intersection traffic signal control machine, which comprises 24 to 48 paths of signal lamp detection control channels; a signal lamp detection control unit which comprises a signal lamp output control terminal and a signal lamp detection circuit; 2 to 4 yellow flashing control units; a signal program control module which comprises a signal lamp state detection unit and a signal lamp control-signal program control unit; a core control unit; a state display unit; and a communication interface unit. The multi-intersection traffic signal control machine employs virtual mapping technology, maps a real semaphore hardware resource to 2 to 4 virtual semaphores by digitalized programmable technology, realizes totally separated running of the virtual semaphores according to an own running characteristic parameter of each virtual semaphore, realizes the function of controlling multiple intersections by a semaphore, enhances the multifunctional degree and the intelligentized degree of the semaphores, reduces unnecessary semaphore hardware resource investment and improves the release efficiency at the adjacent intersections.