The primary reason for cage training is to train your puppy to accept and treat their crate as their home. They will learn to feel safe and protected in the crate and in addition they may also be easily moved as needed. Crate training puppies is mainly undertaken as a means of house-training. 

The first thing to do is attempt to make the dog familiar with the crate and make it even more inviting by placing its bed inside together with toys or any other things that the puppy is familiar with, one other good idea is to reward the puppy for going in the crate as well as for remaining inside, initially for short periods of time and always leave the door open.