Abstract: The synthetic diamond tests were carried out using a six-anvil high-pressure apparatus and a new sheeted iron-base catalyst made by power metallurgy.That electric current used in the tests reduced within a wide scope.The consumption of the hard alloy anvil caused by explosion was reduced to zero.Due to using the new catalyst,the metallic film surrounding diamond had high brittleness so that the synthetic mass could be separated by mechanical means,which could reduce the environment pollution caused by electrolysis and acid treatment.The diamond made in the tests possesses good shape and high intensity so that they can be used in the industrial field.