The current study evaluate the effect of aqueous extract from the shoot of Alhagi maurorum at different rates (0.01, 0.05, 0.10, 0.15 %, w/v) on some physiological parameters of pea. The pot experiment revealed that Alhagi maurorum aqueous extract reduced all growth parameters of pea plant. Also, photosynthesis pigments, insoluble sugars, total carbohydrate, total protein and total phenolics were markedly reduced in response to treatment with aqueous Alhagi extract. On other hand, soluble sugars, soluble protein, proline and flavonoids increased upon treatment with Alhagi maurorum extract.