The invention provides a management method for processing resources in distributed stream processing. The method comprises the steps that when a processing load of a certain processing unit meets a predetermined splitting condition, a maximum object processing rate of the processing unit is acquired; statistics is performed on an object generation rate of each object stream in an object stream group processed by the processing unit; the object stream group comprises at least one object stream; at least one subset of the object stream group is made into a new object stream group, and the new object stream group is processed by other processing units, wherein the sum of the object generation rates of all the object streams in each subset does not exceed an object processing rate peak value; and the object processing rate peak value is determined according to the maximum object processing rate. Through the technical scheme, the object stream group is automatically split according to the object processing rates and the object generation rates when a stream task is busy to increase the stream processing rate, and processing units responsible for processing can be added in time according to running conditions when the volume of business is increased.