Facing the urgent need of dynamic measuring force sensor for heavy load, multi-dimensional, high-frequency and strong impact load in the field of high-performance bearing rolling element forming quality monitoring, a new structural form and measurement principle of piezoelectric film three dimensional heavy load force sensor are proposed. The sensing element of the sensor is composed of upper, middle and lower piezoelectric films. The change of three-dimensional force causes the change of charge of piezoelectric films cut in different regions of each group, so as to realize the calculation of three-dimensional force. The sensor support shell plays the role of load sharing, so as to realize heavy load measurement. The quasi-static calibration experiment of the sensor prototype is carried out. The experimental results show that the sensor has the advantages of good linearity. The nonlinear error is less than 2%. It can meet the dynamic measurement requirement under heavy load. Therefore, it provides an important reference basis for the design, development and application of piezoelectric thin film force sensor in the field of heavy load multi-dimensional load dynamic measurement.