A sheet pick-up module includes a driving shaft, a driving shaft sleeve, a pick-up driving roller, a pick-up roller sleeve and a sliding sleeve. When the driving shaft is rotated to drive rotation of the driving shaft sleeve, the driving shaft sleeve pushes the sliding sleeve toward the pick-up roller sleeve, and the sliding sleeve is rotated to push the pick-up roller sleeve, so that the pick-up driving roller and the pick-up roller sleeve are synchronously rotated to transport the document at a pick-up speed. When the feed roller is contacted with the document to transport the document at a feed speed faster than the pick-up speed, the pick-up driving roller is driven to rotate by the document, and the pick-up roller sleeve is rotate to push the sliding sleeve, so that the sliding sleeve is moved in a direction away from the pick-up roller sleeve.