my iphone 5 not charge with orginal charge please help me ?

Is the lightning cable okay? Did he purchase it from the apple store? Try testing the cable with a different iPhone to see if the problem is coming from the cable itself, otherwise, i would suggest you take the iPhone to the apple store for them to check it out. But it might be that a dirt is obstructing the lightning cable from getting right into the charger port. See if you can see a dirt hanging around it.