Land degradation is one of the major challenges in the development of plant species diversity inrnmany parts of the world, especially in developing countries like Ethiopia. Even though a numberrnof Soil and water conservation methods were introduced to contest land degradation, there arernsome areas that do not show significant progress. This study was conducted at kebelle SaesiernWoreda Saesie Tsaeda Emba, Eastern zone of Tigray Regional state. The purpose of the studyrnwas to evaluate the impact of SWC on the advancement of plant species diversity. Reasonably, itrnwas focused on the methods of SWC, plants that grow after SWC implementation and thernvariation between conserved and un-conserved areas regarding their plant species diversity. Therndata was collected by questionnaire, interview and field observation. To collect reliablerninformation, a total of 65(41 male and 24 female) households from the kebelle were consideredrnin the questionnaire administration and another 10(7 male and 3 female) households and onernKebelle agricultural expert were interviewed. In addition to this, several field visit was carefullyrnconducted and 100m2 area for each 44 plots were demarcated from slopes and plain lands. Thenrndifferent plant species inside them were counted. The data obtained through questionnaire wererncomputed with frequency and percentage in Microsoft Excel and then discussed in bothrnquantitative and qualitative approaches. The data gathered via interview and field observationrnwere also quantitatively & qualitatively analyzed using the descriptive data analysis method. Thernresult shows that, the common methods of SWC in the study area were dam construction, hillsidernterracing, hung dung trenches, Water harvesting, contour plough, afforestation, reforestationrnand over grazing control. Due to those techniques plants developed in type, structure andrnnumber. Necessarily, human and animals became beneficiary from the land reclamation. On thernother side, the data indicates the presence of un-conserved and conserved but no protected landsrnwith their feeble growth of plant species. From this, the study concluded that plant speciesrndiversity cannot enrich unless the area is conserved and protected. Therefore, the careful pursuernof stakeholders on natural resources conservation should be a core issue.