Widespread applications of titanium alloy material in helical milling have been significantly increasing in the aircraft manufacturing process. As one of the most important physical quantity, the cutting force can reflect the essence of interaction between tool and workpiece. However, it is difficult to predict the cutting force accurately due to the special eccentric machining method of helical drilling. The traditional experience model based on experiment has low efficiency and poor applicability, which can’t meet the demand of cutting force prediction in actual working condition. With the development of numerical calculation method and finite element technique, the modeling of cutting force based on metal cutting theory has reflected many advantages and became one of the focuses of the research on the cutting force of holemaking by helical milling. In this paper, the unique advantages of analytical model are analyzed based on the illustration of two-dimensional cutting theory, and the development status and trend of cutting force model for helical milling of titanium alloy are summarized, focusing both on the finite element model and the thermo-mechanical coupling model.