Aiming at the problems that the current piezoelectric threedimensional force sensor has difficulty in positioning and complicated manufacturing process due to adopting multiple stacks, a novel piezoelectric threedimensional force test device with cubic quartz crystal blocks as force sensitive components is proposed. The surface stress distribution law of piezoelectric quartz block under the action of threedimensional force loading is studied. The mathematical model between surface stress and induced charge density is established according to the “forceelectric” conversion formula of piezoelectric effect. The structure design of the novel piezoelectric threedimensional force test device is completed and the static calibration experiments are carried out based on obtaining the mapping relationship between the amount of charge in a specific area and the threedimensional force. The results show that the linearity of the novel piezoelectric threedimensional force test device is 1.39%, the repeatability is 4.52%, and the crosstalk is 5.02%, which indicates that the quartz crystal block can also measure threedimensional force.