The utility model relates to a time-delay coupling and comprises a motor input flange, a rear auxiliary chamber cover, a pump impeller, a transcapsidation, a turbine, an output shaft, a conjunctive path and a flow regulating valve, wherein the motor input flange, the rear auxiliary chamber cover, the pump impeller and the transcapsidation are connected as an integral body, the turbine and the output shaft another integral body, both ends of the said conjunctive path are respectively open to the rear auxiliary chamber cover and the pump impeller and the said flow regulating valve is arranged on the conjunctive path. The utility model is characterized in that the utility model adjusts the speed and time of operating fluid flowing into the working chamber by the flow regulating valve, realizing a time-delay start and meeting the mechanical operating need of a large inertia.