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Salinity is one of the most important factors that reduces the growth and production of plants in arid and semiarid regions. In our study, a pot experiment has been conducted in a factorial based on a complete randomized block design with 3 replications at the Faculty of Agriculture, University of Urmia, Iran, in 2016. In this study after applying the humic acid for two-months in four levels: (A0): control (Al): 2.5, (A2): 5 and (A3): 7 kg ha(-1), salinity was applied at four levels: (BO): control, (Bl): 60, (B2): 120 and (B3): 180 mM NaCl, for two months on 3 almond rootstocks: (CO): Sangi almond seedling, (Cl): GF677 and (C2): GN15. Results showed that increasing the salinity increased the leaf soluble proteins synthesis and CAT and POX activity up to 60 mM NaCl, but reduced them at higher levels. Also, electrolyte leakage increased from control to 180 mM NaCl. Using humic acid, by contributing to the absorption of essential nutrients such as N and K, increases the soluble proteins and enzymes synthesis more, leading to reduction in the electrolyte leakage. So, the highest and lowest protein and enzymes synthesis were related to 60mM NaCL, 7kgha(-1) humic acid and 180mM NaCL, control treatment of HA, respectively. The highest and lowest electrolyte leakage was related to 180 mM NaCL, 2.5 kg ha(-1) humic acid and control treatment of salinity, 7 kg ha (-1) humic acid. Finally, GF677 with the highest protein and enzyme synthesis and the lowest electrolyte leakage was better and Sangi seedling and GN15 were placed in the next positions, respectively.