With Death Knight is being able to begin in Wrath of the lich King World of Warcraft, people are looking for the fast way to level up the character, the best talent build for WOW leveling will do a great help. No matter what talent spec you decide to go with, the Death Knight has damage and survival in every line. The more popular lines for solo leveling tend to be Blood and Unholy.

Blood Tree

Blood tends to be more single target oriented with the specialization in physical damage, burst and the ability to amplify the rewards of leeching health. Blood has a few talents that really speed up the WOW power leveling process.

Butchery

Butchery is a very solid for anyone who wants WOW powerleveling and most drops builds that want to utilize some of the blood tree. Being able to Generate 20 RP(Runic Power) each mob you kill and 2 every 5 seconds, allows you to continuously have RP to go from mob to mob.

Scent of Blood

This is a great skill in combination with Butchery for the solo WOW leveling DK that wants to spam death coil or blow their Runic Power. Even though, Death knights aren't going to benefit from this as much as ones being hit.

Vendetta

Vendetta is very, very useful for the solo Death Knight. While WotLK leveling up as blood, you will almost never need to rest or stop to heal as you gain 6% total life per honor/exp kill.

Now, there are many other talents that help PVE, but the above three really push the Blood DK forward when it comes to leveling fast and efficiently.