The invention discloses a strain-induced semi-solid forming device and a strain-induced semi-solid forming process for a fine-grained bearing pad. The device comprises three major parts, namely a pre-deformation device, a medium-frequency heating rotating device and a semi-solid upsetting device, wherein the pre-deformation device is fixedly arranged above the medium-frequency heating rotating device; the semi-solid upsetting device is positioned behind the left part of the pre-deformation device, and moves up and down in the medium-frequency heating rotating device. In the corresponding process, the device is used for sequentially performing blank pre-deformation treatment on a blank, performing semi-solid heat-preservation treatment on the deformed blank and performing upsetting treatment on the semi-solid blank. The device is reasonable in design, the process is easy to operate, a formed bearing pad part has good characteristics of a fine-grained structure and high comprehensive performance, and can be automatically and continuously produced, the production efficiency of the bearing pad is effectively improved, and the production cost of the bearing pad is lowered.