The invention discloses a method for predicting low-frequency radiation emission characteristics of an electrically driven mobile device. The method comprises the following steps of determining a main disturbance source; building an electromagnetic simulation grid model; applying equivalent voltage spectrum or equivalent current spectrum excitation to a part wire harness port as the main disturbance source, and calculating a transfer function from a disturbance port to a target test point; measuring a disturbance voltage or a disturbance current on the part wire harness port as the main disturbance source; obtaining a predicted value of a measurement result of the target test point; and if the predicted value does not meet the requirement, changing a complete device, wire harness design or parts of a key disturbance source, and manufacturing the electrically driven mobile device according to the finally determined complete device, wire harness design and parts by selection. According to the method, the radiation emission level of system level or complete vehicle level is basically predicted in a design stage; and the radiation emission over-standard risk of the device or the system can be known long before a sample stage, and the design change is performed in time, so that the situation that a serious problem is discovered but the design change is difficultly performed due to freezing of all designs in the sample stage is avoided.