Objective To observe the effect of electroacupuncture(EA) on the learning-memory ability in Alzheimer's disease(AD) rats.Methods Thirty SD rats were equally randomized into control,model and EA groups.AD model was established by injecting ?-amyloid(A?25-35,10?g) into the bilateral dentate gyri of the hippocampal CA 1 area(AP-3.5mm,ML?2.0mm,DV 2.7mm).EA(4Hz,1-2mA) was applied to "Baihui"(GV 20),"Dazhui"(GV 14),bilateral "Shenshu"(BL 23) and bilateral "Yongquan"(KI 1) for 30min,once daily for 7 days.The learning-memory ability was detected by using step-down test.Long term potentiation(LTP) of hippocampal CA 1 area was recorded by using tungsten microelectrodes after high frequency stimulation(HFS) conditioning of the cortical anterior perforated substance.Results In AD rats,the error number and total error time of step-down test were increased significantly(P