A neuro-electrical signal detection system is researched and faricated. The system uses self-made micro-wire electrode as signal acquisition sensor

amplification and filtering are carried out on weak neuroelectrical signal is realized by weak signal conditioning instrument

upper PC software is developed based on LabVIEW to achieve further analysis

display

and storage of the collected signals. In experiment

160 μV neuroelectrical signal is detected in condition of less than 20 μV noise

signal-to-noise（ S/N） ratio is about 8.Experimental results show that the detection system can be used for weak neural-electrical signal detection.