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The increase in worldwide energy demands and rapidly depleting fossil fuel resources signify the search for sustainable and renewable energy sources [1].Recently,electrochemical water splitting has been proposed to produce hydrogen and oxygen for use in energy.However it's deposition rate and efficiency critically depends on catalyst [2].Transition metal doped graphyne may be a good candidate catalyst for electrochemical water splitting.Graphyne,is built by inserting the acetylenic linkage between two bonded carbons in graphene [3] and has been proposed as a potential electro-catalyst for fuel cells because of it's very high surface area and excellent electrical conductivity [4].In this paper,we first calculate the density of state of graphyne and metal doped graphyne.Next,we intend to testing it's electrocatalytic performance for oxygen evolution reaction and CO2 reduction.