A swing type filling device of particle automatic packaging machine was designed to solve the problems of turn-plate type filling device, which were material easy to be damaged and missed in the packaging process and the structure difficult to be disassembled and cleaned. The measurement of the device adopted tunable volume method. The measurement vessel composed of two triangular part and clapboard in the dynamic course of packaging. A ram with horizontal alternate motion make the feeding pipe left-right shifts to do the measurement of the material, and promote the hopper with the fixed axis rotation to perform dropping material.