Parkinson previously worked with Alan Pardew at Reading

The 39-year-old worked with Pardew when they were at Reading before going on to take over at Colchester and guide the Essex club into the Championship.

However, his subsequent spell at Hull was not successful and he parted company with the Tigers in December.

"I'm looking forward to working with Alan, for whom I have utmost respect," Parkinson told Charlton's website.

"With the right level of commitment and application by everyone connected with the club, I believe we can stay up this season.

"All my energies will be focused on that objective."

Addicks boss Pardew added: "While Phil is in between jobs I have taken the opportunity to bring him here until the end of the season because I know he can make a difference in terms of his knowledge and his passion to try and keep us in the Premier League."