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Twelve kinds of semi-empirical and empirical mathematical drying models were analyzed. Using experimental data of the heat pump cabbage seeds drying from the finding references, the twelve kinds of drying models have been studied according to the considerations or no considerations of dry air’s temperature and relative humidity. Four statistical indexes including coefficient of determination R2, root mean square error ERMS, reduced mean square of the deviation χ2, mean relative percent deviation EMD, have been used as the criterion for selection and analysis of different models. Results showed that after considering influences of both temperature and humidity of dry air, most of the twelve models have higher R2, lower χ2, ERMS and EMD. The models of modified Henderson and Pabis, Midilli et al and Two-term exponential are more accurate than others.