Abstract: 3D concrete printing test is an effective means to study the damage mechanism of complex geological structures. During the printing process, piezoelectric aggregates can be accurately put in the designed palaces in the printed model, which improves the accuracy of damage identification. In this paper, the 3D printing technology was used to prepare the surrounding rock model with intermittent joints. The damage process of the model under uniaxial loading was monitored based on piezoelectric aggregates and digital image correlation (DIC). The influence of intermittent joint connectivity on the failure mechanism of the surrounding rock model was studied, and the feasibility of monitoring the crack-initiation position and crack propagation with piezoelectric aggregates was verified. Results show that the ductility of the load-displacement curve increases with the increase of the joint connectivity ratio, changing from a single-peak curve to a multi-peak curve. The crack-initiation position of the surrounding rock model is mostly located at the joint tip or the middle of the roof and floor. The crack propagation direction is mostly along the joint tip, and the failure mode is block-separation failure. The increase of the connectivity ratio of the prefabricated joints in the surrounding rock leads to the attenuation of the monitoring signal energy in the same path, and there is a parabolic correlation between the connectivity ratio and the signal energy. Compared with macroscopic observation methods such as DIC, the piezoelectric aggregate monitoring method can detect the damage of the model structure earlier and determine the location of the damage.