Abstract: Field sensitive type self-adaption electromagnetic shielding material belongs to a new material, when external electromagnetic field exceeds the critial field, the material will occur insulation/ conduction phased transition phenomena immediately in the nanosecond time, in other words, the insulated materials normally became metallic materials with high conductivity, Owing to threshold-of-critical field was so high that traditional static test method and low-voltage dynamic test can not satisfy test requirement. According to the working mechanism of the material, the dynamic test device which could generate high field was designed, through emulation and electromagnetic theory, feasibility of the test device was analysed, its specific parameter is established, the dynamic test device was developed successfully, the test method was established, the test results show that the device can test the material of resistivity, response time and threshold of critical field with the equivalent resistance of metallic materials is below 1 kW, critical field is below 1 MV/ m, response time is below 1 ms.