Abstract: Suspended monorail transit is a kind of rail transit with small passenger volume, the extension and supplement of road traffic system in large and medium sized cities. Despite of the long history, the suspended monorail transit does not have national and industrial technical standards in China yet. Taking the suspended monorail transit on the air rail demonstration section in Kaifeng City as the research subject, and through synthetic comparative analysis, a DC traction power supply+lithium battery backup power supply system is adopted to provide stable and reliable power for trains with side contact current collection mode.