The present status about wastewater treatment at highway affiliated facilities of China including characteristics of wastewater and treatment technology, the effect of wastewater treatment were investigated. It was found that wastewater quantity was mainly depending on traffic volume entering the service area. Integrated process of wastewater treatment was the main technology used at highway affiliated facilities. 80.4% of the total devices discharge the water which can meet the “Integrated Wastewater Discharge Standard (8978-1996)”. About 69.6% of water was discharged into the road ditches, 22.2% was used for greening and flushing toilet. 3.9% of water evaporated naturally, 2.7% of water was discharged into the river, and only 1.6% was used for agricultural irrigation. The results provided scientific reference for the construction, improvement and management of wastewater treatment device at highway affiliated facilities by relevant departments in the future.