铁电材料极化后，如果把前沿很陡的矩形电压脉冲加到铁电材料上，在铁电畴反转过程中将产生不同于充电电流的开关电流。利用微机、控制卡、数字示波器及自制测试仪器研制成了一套铁电材料开关电流测试系统。用自行编制的软件，可按不同测试要求产生各种波形的测试信号。利用此测试系统对ＰＬＺＴ（７／６０／４０）铁电薄膜的开关电流进行了测试，取得了较好的测试数据。 After polarization of the ferroelectric material, if the rectangular voltage pulse with a steep front edge is added to the ferroelectric material, a switching current different from the charging current will be generated during the inversion of the ferroelectric domain. The use of computer, control card, digital oscilloscope and self-made test equipment developed a set of ferroelectric material switch current test system. With their own software, according to different test requirements generate a variety of waveform test signal. The test system was used to test the switching current of PLZT (7/60/40) ferroelectric thin films, and the better test data were obtained.