Abstract: An endogenic protection method for function security and network security of a sensing and decision-making module of an intelligent connected vehicle, including the following steps: designing and implementing four sensing and decision-making units having the same function and a certain degree of heterogeneity, and deploying same on a vehicle; the four units respectively deducing real-time vehicle control decision-making results according to sensed information; an arbiter performing accurate arbitration and approximate arbitration according to decision-making results of three of the sensing and decision-making units; and finally, according to different decision-making results of the arbiter, the vehicle executing a CAN command, or replacing an anomalous unit and performing arbitration again, or operating according to a failure mode until the vehicle stops.