The present invention discloses organic intermediates oxalic acid aldehydes synthesis method, comprises the following steps:ethylenediamine is added to the reaction vessel, slowly raises the temperature, raises the temperature, adds sodium nitrate solution, controls the stirring speed, react, then the butenoic acid ethyl ester solution is added and the reaction is continued, the temperature is increased, adds tetrakis (triphenylphosphine) platinum powder, continues to react, and then reduces the temperature, washed with potassium chloride solution for several times, washed with the dichloromethane solution for several times and washed with the dichloroacetonitrile solution for several times, recrystallized from the 2-hexanol solution, and the dehydrated with dehydrating agent, obtained the finished product oxalic acid aldehyde. Figure 1
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