This paper analyses the features of the enterprise's Human Resource(HR)in the age of Knowledge-Based Economy.It puts forward a new HR measuring mode at the core of ABC management Method.The main principle is that we classify the employees' into"n"ranks according to their working behaviors,then get the latest Rank Value Weight Coefficient ("Vi ")on the basis of new financial data at the end of every Accounting term.Finally,progressively to plus the algebraic product between the number of employees of every rank and the"Vi "related to it's rank to get the current HR value of the enterprise.This paper mainly investigates some key HR mathematic problems and discusses the application of this measuring mode in the field of Enterprise Management.