The basic situation and development trend of the car dumper system in coal ports of China and abroad are introduced.Combining with the engineering practice of quadruple car dumper,we describe the design and research process for the technological system of the large multi-functional car dumper,and a large-scale multi-function car dumper system developed which is capable of unloading four wagons in a dumping loop,and meet the demands of C64 uncouple wagon,C70A and C80 couple wagon,KM80 bottom wagon,etc.This system can satisfy the increasing coal production and meet the development demands of the car dumper system with the orientation of large-scale,efficientness,environmental protection,multi-function.