The invention provides a chip security access control device and a chip system. The system comprises a plurality of firewall units and safety processors, the firewall units and the safety processors are in one-to-one correspondence with bus units, the bus units comprise bus master control units and bus controlled units, and the firewall units comprise safety master firewall units and safety slavefirewall units and correspond to the bus master control units and the bus controlled units respectively. Wherein the firewall unit is used for controlling access and accessed behaviors of the bus unitcorresponding to the firewall unit according to a specific detection rule, and the safety processor is used for configuring the detection rule. According to the technical scheme, the device has the advantages that the device is simple in structure, the firewall unit separates a bus unit (a bus main control unit or a bus controlled unit) corresponding to the firewall unit from the functional bus;the bus units are connected with the control software, and the access authority or the accessed authority of the bus units is controlled, so that a direct hardware path does not exist between any twobus units, data leakage cannot be caused even if the control software fails, and the security of a chip is effectively improved.