The utility model provides a leakage current of an arrester signal pickup assembly, including shield ring, current sensor, electric current vasculum, the monitor that connects gradually, shield ring ground connection, the signal filtering ware, adc, the microprocessor that be provided with automatic alarm module, transport module, power module in the electric current vasculum, connect gradually, transport module include wired transport module, wireless transport module, USB flash disk data transport module, and microprocessor is connected with the monitor through wired transport module or wireless transport module, and wireless transport module includes bluetooth transport module, GPRS transport module. This kind of structure is adopted, other electromagnetism of production in the stray capacitance that produces and the environment can be effectively shielded between the three -phase metal oxide arrester, USB flash disk transport module and bluetooth transport module's setting for still, can derive the data of gathering under the circumstances of not having the net, and can carry out data analysis and save at any mobile terminal.