The invention provides a communication based expenditure presentation processing method and device. The communication based expenditure presentation processing method comprises the steps of calling an expenditure presentation process instance corresponding to an expenditure presentation triggering request from a pre-configured expenditure presentation process instance, wherein at least two nodes are arranged in the expenditure presentation process instance, each node is connected through a precursor relationship, each node comprises at least two tasks, and each task in one node is connected through the precursor relationship; carrying out each node in sequence based on the sequence represented by the precursor relationship of each node in the expenditure presentation process instance which corresponds to the expenditure presentation triggering request, and carrying out each task in each node in sequence based on the sequence represented by the precursor relationship of each task in each node while carrying out each node. According to the communication based expenditure presentation processing method, as an automatic processing mode is provided for automatic expenditure presentation, the expenditure presentation process is relatively clear; and as a lot of manpower is unnecessary, the expenditure presentation cost is accordingly reduced, and the expenditure presentation efficiency is increased.