By using common carp as main object of this studp, the electri-city-sensing field intensity, the threshold electric curxent value of #ish in c/4twe-way pulse ground and the electricity-sensing range of two-line electrode polewere determined. Since the successful technical way referred electric groundin eonjunction with fishing gear reasonable electric ground could be foamedefficiently in leadline the blocking net, so as to block up fish's escapethxau leadline. A cod end was supplemented in the leadline for purpose ofstoppirg up fish's escape loopholes due to the "rising of leadline" during thefishing operation. Thus,the difficult pxablem for catching freshwater bottom fishwas effectively solved. An average catching rate of 85-98 could be attained inthree hauls for common carp in a. fiT ha of enclosed fish farming area and an, eve-rage catching rate of 8Tin five hauls in 10 ha of enclosed fish faxming areacould be obtained. The catch rate is raised to la times as compare with the tradi-tional fishing method.