The utility model discloses an electric field jammer capable of eliminating multiple harmonic waves, which comprises a housing, wherein a digital multimeter is mounted in the housing, a multimeter contact is mounted on the digital multimeter and extends out of the housing, a charger socket and a storage module are mounted in the housing, the digital multimeter is arranged between the charger socket and the storage module, the charger socket and the storage module are connected with the digital multimeter respectively through conducting wires, a guide rail is arranged in the housing, a capacitor is mounted on the guide rail, two plugs are mounted on the capacitor, two binding posts are arranged on the side wall of the digital multimeter, the two binding posts correspond to the two plugs respectively, a sliding block is mounted on the capacitor, a sliding groove is formed on the housing, the sliding block is positioned in the sliding groove, an operation window is formed on the housing, and the digital multimeter is positioned in the operation window. The problem that the DC resistance of secondary circuit can't be measured correctly due to the influence of the multiple harmonic waves can be solved, and the electric field jammer can ensure the working time, reduce the working intensity, and ensure the work progress.