In order to solve matchability evaluation of laser real-time image in practical application,six common evaluation parameters of laser image were screened by the optimized principal component analysis,finally four key parameters that can well evaluate image quality were obtained.A matchability evaluation model of laser image was established through four parameters.The experimental results show that the results of the evaluation model have a good consistency with matching ratio of laser image,which indicate that this model has reference value for matchability evaluation of laser image in the practical application.