In the Internet of Things, location information is considered as not only one of the basic elements of sensing information collected by sensors but also an essential prerequisite for providing location based services. On the one hand, location information can facilitate people's lives, but on the other hand, such information exposure may cause great harm to the users. The location privacy preservation for Internet of Things has become one of the hottest topics in the academic world. This paper first states the objectives and challenges of achieving location privacy preservation for the Internet of Things. Then, it provides an overview on the location privacy leakages and the corresponding privacy preserving techniques in localization, location based services and side information. Finally, it discusses the future directions on location privacy preservation for the Internet of Things.