The present disclosure proposes a pixel driving circuit and a display device. The pixel driving circuit comprises a driving transistor, a first data writing module and a second data writing module. The driving transistor comprises: a channel in a channel layer, a first gate in a first gate layer, and a second gate in a second gate layer, and an output end electrically connected to a light generating unit. The first gate and the second gate are respectively located at opposite sides of the channel. The first data writing module comprises an output end electrically connected to the first gate. The second data writing module comprises an output end electrically connected to the second gate.