The environmentally friendly drilling fluid can protect the reservoir stratum，and prevent environment from being destructed. In the paper，the current status and progress of the environmentally friendly drilling fluid at home and abroad，including methyl glucoside drilling fluid system，polyamines drilling fluid system，synthetic-based drilling fluid system，organic salt drilling fluid system，were mainly introduced. The drilling fluid system were evaluated and compared，and some suggestions were provided for the relevant developments，which were expected in the future.