The mechanical properties of the connection joints/horizontal joints of the fabricated shear wall structure play a vital role in the fabricated structure. To improve the seismic performance of the fabricated shear wall structure, we designed and developed a new type of horizontal connection device based on the energy dissipation technology. Through the design, two kinds of horizontal connection devices with different numbers of bolts were prepared. The dynamic mechanical properties of the devices under different sinusoidal loading frequencies were tested, and the influences of bolt preload, loading frequency, and bolt number on the mechanical properties of the device were explored. The influence of temperature rise caused by friction on the mechanical properties of the device was investigated. Results show that the device could ensure the reliable connection of the structure and meanwhile consume much seismic energy due to the internal friction, so as to effectively reduce the seismic response of the structure and protect the main structure. In addition, the bolt preload linearly correlated with the energy dissipation capacity and secant stiffness of the device, but had little effect on the equivalent damping ratio. The mechanical properties of the horizontal connection device were hardly affected by the loading frequency. Increasing the number of bolts could greatly improve the energy consumption capacity of the device. Bolt preload and loading frequency were important factors for the temperature rise in the device, but the temperature change in the device had little effect on its mechanical properties.