Along with the continuous development of Chinas aviation detection and deep sea exploration technology,etc.,electronic equipment will be faced with increasingly complicated and harsh natural environment,such as high temperature,high pressure,and fierce electromagnetic radiation.Therefore,electronic equipment should be more reliable and adaptable.If the electronic equipment doesnt work well,it may damage the electronic equipment or even cause serious casualties and property losses.Traditional circuit fault-repair methods based on redundant fault-tolerant technology are easy to be implemented.However,there are some limitations in the above methods,e.g.excessively consumed hardware or dissatisfied environmental adjustment.For this reason,a novel structure of EECA based on functional decomposition and circular removal self-repair is designed and a typical functional circuit with self fault-repairing capacity can be implemented,so as to gain higher reliability with less hardware resource consumption.A complex functional circuit is decomposed to small and easy circuit modules to complete the functions of the complex functional circuits the fault detection on functional modules is based on the circuits function,and the communication and data transportation between different modules are completed by bus bar.The general structure of the EECA and all sub modules of the array are designed and simulated.A new circular self-repair strategy is put forward based on characteristics of the designed EECA.Through the successful simulation of a typical digital circuit implemented with the designed EECA and selfrepair strategy,the feasibility of the proposed theory is verified.A comparison with the classical EECA structures is completed from circuits reliability,the circuit implementation,fault detection,and hardware resource consumption during self-repair by simulation.The results show that the proposed EECA and self-repair strategy not only ensure the higher reliability of the functional circuit,but also effectively reduce the hardware resource consumption.