In order to improve the design quality and design efficiency of aircraft assembly fixtures interior boards, we analyze the structural characteristics and design process of the interior boards, develop a rapid design tooling for interior boards. The tooling uniforms the design process, solving three key problems of the traditional design process: the parameterized model of interior boards base is established, the fast extraction algorithm and the automatic extension algorithm are put forward to generate the interior boards working face, a batch design method for interior boards grooves is proposed. Finally, an application example of the rapid design tool is given.