Abstract: A self-reconfigurable array cell structure with the ability of self-testing and self-repairing is presented.The distributed fault self-diagnosing can be achieved in the function cell unit.When the fault is tested,the nearest spare cells can automatically replace the faulty cells,cancel the nets which effected by fault automatically,and reroute these nets between the new endpoints.A 4-bit parallel multiplier is chose as an example.The experiment result demonstrates self-repairing ability of self-reconfigurable cell array,and testify it requires short reconfiguration time and improves the reliability.