This research was conducted on-farm research and Research Laboratory Department of vegetables and ornamental Faculty of Agriculture, MansouraUniversity during successive seasons 2010/2011- 2011/2012. In order to study the effect of different levels of salinity (0.3-0.4-0.5-0.6-0.7-0.8-0.9-1.0-1.1%) on the vegetative growth and seed yield and oil percentage and installation of the plant canola (Brassica napus L.) Seru 4 cultivar The results showed that measurements growth vegetative has fallen largely moral decline in parallel with the level of salinity in the middle of Agriculture has indicated results also canola plants have suffered from increased salinity where given less oil percentage in the seed increase of salinity In addition to that analysis showed chromatographic for oil samples increase the oil content of  saturated fatty acids such as Palmitic acid and Stearic and Arachadic but unsaturated fatty acids such as oleic acid and Linoleic has decreased with the increase of salinity in the middle of Agriculture and finally results suggest that increasing the salinity of the soil has led to giving the highest increase of the level of Eurcic acid harmful in oil And the previous results we can recommend oil crops producers the possibility of planting canola in the occupied Egyptian at salinity level less than 0.9% to give the highest values ​​of measurements of vegetative growth and seed yield and oil percentage