An array of microelectrode with different scales were fabricated by micro electro mechanical system（MEMS）technology

and electrochemical microflow systems were designedAccording to the characteristics of electrosynthesis of glyoxylic acid

the electrochemical oxidation of glyoxal was chosen to demonstrate the utility of the microflow system designed in the present study The results showed that the microflow system with simple geometry was easy to control and had the continuous production of products The electrosynthesis of glyoxylic acid from glyoxal without attentionally adding of supporting electrolyte can be carried out in the system