The invention relates to the related technical field of electronic science and technology, in particular to a three-dimensional multi-station machining device for electronic parts. The device comprises a machine tool, a transmission machine frame and an operation machine frame, the transmission machine frame is mounted on the machine tool, the operation machine frame is mounted on the transmissionmachine frame, the transmission machine frame and the side edge of the machine tool are movably mounted through a longitudinal transmission mechanism, a transverse transmission guide rail is arrangedon the transmission machine frame, a transverse sliding block is installed on the transverse transmission guide rail, a transverse transmission lead screw is installed in the transverse transmissionguide rail, the transverse sliding block is installed on the transverse transmission lead screw through threaded connection, the operation machine frame is installed on the transverse sliding block, the operation machine frame comprises a fine adjustment track and an operation cabinet, and the operation cabinet is installed on the fine adjustment track. According to the design, multiple stages oftransmission mechanisms are arranged and adjust the operation direction in a three-dimensional mode in the X-Y-Z-axis direction, and therefore the requirements of multi-station and multi-point streamline machining are met.