An excitation regulator capable of pulsed operation mode was developed using LabVIEW graphical programming language and NI CompactRIO. The excitation regulator including industnal PC as host computer and embedded system as slave computer was able to monitor and control the system working state during discharging in real time. The digital incremental PID algorithm was used to feedback control the toroidal field current with a control period of 1 ms. Actual operation results showed that the regulator had the advantages of high control precision, stability and reliability.