The invention relates to an automatic feeding machine and a using method thereof. The feeding machine comprises a case, a feeding conveying line body, a discharging conveying line body, a lifting assembly, a pushing positioning assembly, a translation assembly and a material taking platform, wherein the feeding conveying line body, the discharging conveying line body, the lifting assembly, the translation assembly and the pushing positioning assembly are all arranged in the case, and the feeding conveying line body is arranged below the discharging conveying line body; and the material takingplatform is arranged on one side of the machine box and is right opposite to the pushing positioning assembly. The using method is easy and flexible to operate, convenient to use and high in applicability; the defects that existing feeding equipment is low in automation degree and high in labor cost are mainly overcome, automatic supplying and transferring are achieved, the three-dimensional spacefolding design is utilized, the equipment size is reduced, the space utilization rate is increased, equipment hardware is reduced, manual operation is reduced, and the automation degree is improved.