A feeding structure, comprising: a feeding mechanism, one end of which is a feed end, the other end of which is a discharge end, the feeding mechanism comprises a feed pipe and a conveying pipe that are communicated with each other, a mounting part entering from the feed end can be conveyed to the discharge end through the feeding pipe and the conveying pipe; a propulsion mechanism, which is provided on one side of the feeding mechanism, a material receiving portion for communicating with the discharge end to receive the mounting part is provided on a shell of the propulsion mechanism, a propulsion unit action of the propulsion mechanism can push the mounting part conveyed to the material receiving portion and mount same in a target position, a central axis of the propulsion mechanism is parallel to a central axis of the feed pipe, wherein the feed pipe and the conveying pipe are connected through a bending pipe joint, which is fixed outside the shell of the propulsion mechanism, a first end of the bending pipe joint is fixedly connected to the feed pipe, the other end of the bending pipe joint is movably connected to the conveying pipe, the conveying pipe can oscillate relative to the propulsion mechanism under the action of the propulsion mechanism, characterized in that the other end of the bending pipe joint is of a cylindrical structure, an opening is provided on the cylindrical structure along an oscillating direction of the conveying pipe, so that the conveying pipe can oscillate through the opening and wherein the first end of the bending pipe joint includes a first cylindrical connecting section and wherein the feed pipe is screwed into the first cylindrical connecting section via a threaded connection. a feeding mechanism, one end of which is a feed end, the other end of which is a discharge end, the feeding mechanism comprises a feed pipe and a conveying pipe that are communicated with each other, a mounting part entering from the feed end can be conveyed to the discharge end through the feeding pipe and the conveying pipe; a propulsion mechanism, which is provided on one side of the feeding mechanism, a material receiving portion for communicating with the discharge end to receive the mounting part is provided on a shell of the propulsion mechanism, a propulsion unit action of the propulsion mechanism can push the mounting part conveyed to the material receiving portion and mount same in a target position, a central axis of the propulsion mechanism is parallel to a central axis of the feed pipe, wherein the feed pipe and the conveying pipe are connected through a bending pipe joint, which is fixed outside the shell of the propulsion mechanism, a first end of the bending pipe joint is fixedly connected to the feed pipe, the other end of the bending pipe joint is movably connected to the conveying pipe, the conveying pipe can oscillate relative to the propulsion mechanism under the action of the propulsion mechanism, characterized in that the other end of the bending pipe joint is of a cylindrical structure, an opening is provided on the cylindrical structure along an oscillating direction of the conveying pipe, so that the conveying pipe can oscillate through the opening and wherein the first end of the bending pipe joint includes a first cylindrical connecting section and wherein the feed pipe is screwed into the first cylindrical connecting section via a threaded connection.