A paper feeding apparatus including a paper pickup roller assembly, a paper conveying roller assembly, a one-way driving assembly, and a reverse driving assembly is provided. The one-way driving and the reverse driving assembly are connected to a driving device, such as a motor, wherein the one-way driving assembly is engaged with the paper pickup roller assembly only in one direction to drive the paper pickup roller assembly forward as the driving device rotates forward and stop driving the paper pickup roller assembly as the driving device rotates backward, and the reverse driving assembly is provided for driving the paper conveying roller assembly to constantly rotate forward for conveying the paper sheet to move forward no matter whether the driving device rotates forward or backward.