The invention provides a lapping trolley structure of a lapping machine. The lapping machine comprises a rack, a feeding inclined curtain, an upper flat curtain, a lower cotton conveying annular curtain, a middle flat curtain, a rack front transverse beam, a lapping cart and a lower cotton conveying annular curtain driving mechanism; the lapping trolley structure comprises a lapping trolley assembly; the lapping trolley assembly comprises front and rear wall plates of a trolley, left and right lapping mechanisms, a wall plate traction mechanism, a transition transmission mechanism and a synchronous traction chain; the lapping trolley structure is characterized in that the left lapping mechanism comprises a left cotton pressing lapping curtain tensioning roller, left lapping upper and lower rollers and a left cotton pressing lapping curtain; the right lapping mechanism comprises a right cotton pressing lapping curtain left pressing roller, a right cotton pressing lapping curtain right pressing roller and a right cotton pressing lapping curtain; the right cotton pressing lapping curtain left pressing roller is supported on the front and rear wall plates of the trolley; the right cotton pressing lapping curtain right pressing roller is also supported on the front and rear wall plates of the trolley; one end of the right cotton pressing lapping curtain is arranged on the right cotton pressing lapping curtain left pressing roller and the other end of the right cotton pressing lapping curtain is arranged on the right cotton pressing lapping curtain right pressing roller. By adopting the lapping trolley structure of the lapping machine, the working intensity is alleviated and the lapping efficiency is improved; the quality of non-woven fiber webs is guaranteed.