All rose plants, whether bushes, dwarfs or climbers, need to be pruned. Pruning roses encourages them to grow and produce more flowers. The procedure for pruning climbing rose varieties is a bit different from other types of roses, and should be done in early spring, while the plant is dormant.
Water the climbing rose the day before you prune.
Prune off any dead branches all the way to the main cane.
Remove all suckers from below the graft union. This is the swollen area on the main cane that indicates where the tree was grafted. Use sharp pruners to snip off any growth below the union.
Cut back all flowering branches, leaving two or three buds (these look like bumps on the branches). Make the cut immediately above a bud.
Prune back the main shoots if you want to shorten the climbing rose. You can safely cut it down to 3 or 4 feet.
Remove all leaves from the tree.