The purpose of this research is to investigate the effect of human resource strategies on service efficiency in Iran Khodro Company: the mediating role of employee productivity. This research is applied in terms of purpose and is classified as a descriptive-survey research in terms of method. The statistical population of the present study is the employees of Iran Khodro Company in Tehran Province. To calculate the number of samples in a given population, Morgan's table was used, and based on Morgan's table, the sample size in a population of 10,000 was determined to be 373. The sampling method in this study is simple random. The collection tool in this study is a standard questionnaire, and the questionnaires were provided to the employees in person, and the reliability of the questionnaire was confirmed using Cronbach's alpha coefficient, which was higher than 0.7. Descriptive and inferential statistics were used to statistically analyze the findings. In the first section, the descriptive analysis of the findings is presented in the form of frequency tables and graphs. In the second part, SPSS version 24 statistical software and Smart Pls structural equation modeling were used for statistical inference and hypothesis testing. The results of the study showed that all hypotheses were confirmed. The results also showed that human resource strategies with an impact coefficient of 0.68 have the greatest impact on service efficiency.