In this study was to prepare extracts aqueous and ethanol from Fenugreek Trigonella foenumgraecum Seeds powder, The aqueous extract and ethanol extract were used for analyzing the main phytochemical, nutrient and active groups composition of fenugreek seeds powder Trigonella  foenumgraecum.The preliminary tests of active groups in extracts were carried out. It appeared to contain (alkaloids, flavonoids ,phenolic compounds , tannins ,terpenes and saponins) . The extracts were different in their content of active groups quantitatively and qualitatively. And to evaluate in vitro antioxidant activity of aqueous and ethanol seeds extracts of Trigonella foenumgraecum.,was used three different methods and all the three methods have proven the effectiveness ofextracts aqueous and ethanol from Fenugreek Trigonella foenumgraecum Seeds compared to the reference standard antioxidant ascorbic acid, Showed the study is conducted to estimate the activity of the extracts prepared from Fenugreek Trigonella foenumgraecum Seeds as antioxidant in vitro by measuring the reducing power and their capacity of scavenging hydrogen peroxide as compared with the standard compound ascorbic acid. The results indicated that the extracts aqueous and ethanol Fenugreek Trigonella  foenumgraecum Seeds exhibited the highest had a reducing power and a capacity of scavenging hydrogen peroxide, and demonstrated that extracts antioxidant capacity less than the standard for the reducing power and phosphomolybdate reduction methods. This is observed through increasing the intensity of absorbance with increasing the concentration.