Due to the particularity of the goods，the collection of wastewater in the container yards of dangerous goods has attracted much attention from all parties. Taking the dangerous goods container yard of a port in the Middle East as the background，we determine standards for the initial rainwater volume，the fire accident sewage volume，and the effective volume of the wastewater tank under different standard systems for the dangerous goods container yard. The design ideas in China and abroad are compared. The wastewater tank adopts the intercepting mode of overflow weir and is equipped with pH meter，thermometer，as well as VOC and HAL concentration detector. It realizes the intercepting mode with an automatic alarm. At the same time，suggestions for improvement are also put forward for the deficiencies of the project.