The invention relates to the technical field of electric systems, in particular to an on-site detection device applied to a control circuit of a bursting-type fault current limit device. The on-site detection device comprises a simulated fault current generation module and a monitoring module, wherein the simulated fault current generation module generates simulated fault currents to excite the monitoring module, and the monitoring module monitors an input ignition signal and obtains time difference of the ignition signal and a simulated fault signal. The on-site detection device can be used for on-site debugging detection in installation of a new product and can also be used for performance detection of periodical equipment detection, inconvenience during use of non-professional equipment is avoided, and work efficiency and equipment reliability are improved.