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To analyze the interference effects on intelligent control equipment of low-frequency wide-pulse electric field, irradiation experiment system is established, and experiments are carried out. The effect rules and interference mechanism are confirmed. The results show that low-frequency wide-pulse electric field, which rise time is not less than 10ns and the pulse width is more than 1ms, can affects the normal working performance of the test equipment. But it cannot damage the test equipment even the field intensity reaches 100kV/m. To the intelligent control equipment, the direct effect and cable coupling of the irradiation field lead to the interference phenomenon. The interference is more serious when the orientation of connection line is in accordance with the polarization direction of the irradiation field. The rise time and electric field intensity are two main factors that affect the interference degree.