Abstract: The study of the implementation of neurocomputer is an important research topic in the neural network research field. Several theoretical models and corresponding algorithms have been developed in the theory of neural networks, but there is still little progress in the implementation of neurocomputer, for the problem of large size of network and high density of connections has to be faced. To solve this problem, a scheme of implementation for neurocomputer as well as the formula for fractal dimension are presented in the paper. Physical implementation of a fractal sub structure is given, which is expected to be beneficial for implementing neurocomputer.