The invention provides a high-safety and high-reliability mimic microprocessor device and a data processing method. The mimic microprocessor device comprises a scheduler and a plurality of heterogeneous micro-computing controllers which are respectively connected with the scheduler, The scheduler calculates the receiving rate of the controllers according to the plurality of heterogeneous microcomputers; and the data sent by the external device is distributed to the plurality of heterogeneous micro-computing controllers, operation results returned by the plurality of heterogeneous micro-computing controllers are received according to a preset transmission rate, mimicry judgment is carried out on the operation results according to the current working mode, and the operation results after judgment are output. The plurality of heterogeneous micro-computing controllers participate in operation at the same time, even if a few heterogeneous micro-computing controllers receive external attacksor generate internal vulnerabilities, normal work of the mimic microprocessor device can be ensured, and the correctness of output results is ensured, so that the reliability and the attack defense capability of the mimic microprocessor device are improved.