Abstract: The similarities and differences of FAS(fire auto-alarm system) of each line of Suzhou Rail Transit are sorted from the perspectives of function, linkage conditions, linkage equipment and linkage equipment recovery mode. According to the current FAS settings of each line of Suzhou Rail Transit and the actual job requirements of dispatcher, suggestions for optimization and improvement are put forward, including optimizing alarm sound, checking equipment sensitivity, improvingFASgraphic workstation information, and adding linkage push-the-figure function.