Improved Canonical Quantization Method of Self Dual Field

In this paper, the improved canonical quantization method of the self dual field is given in order to overcome linear combination problem about the second class constraint and the first class constraint number maximization problem in the Dirac method. In the improved canonical quantization method, there are no artificial linear combination and the first class constraint number maximization problems, at the same time, the stability of the system is considered. Therefore, the improved canonical quantization method is more natural and easier accepted by people than the usual Dirac method. We use the improved canonical quantization method to realize the canonical quantization of the self dual field, which has relation with string theory successfully and the results are equal to the results by using the Dirac method.