The invention relates to the technical field of food grinding, in particular to a double-cylinder food grinding machine. The double-cylinder food grinding machine includes a rack, and also includes asecond operation cylinder connected with the upper portion of the rack in a clamped mode, a second grinding part, a first operation cylinder connected with the lower portion of the rack in a clamped mode, a first grinding part and a first motor, wherein the first grinding part and the first motor are connected the position between the first operation cylinder and the second operation cylinder in aclamped mode and arranged in the first operation cylinder in a penetrating mode in the axial direction of the first operation cylinder.. The first grinding part includes a driving shaft, a first rotary connecting piece, an inner rod, an outer plate, a vertical installation rod, stirring fans, a first positioning piece and a rotation base, wherein the inner rod is rotatably connected with the first rotary connecting piece through threads in the radial direction of the first rotary connecting piece; the vertical installation rod is rotatably connected with the upper side of the outer plate through threads; the first positioning piece is arranged on the end part of the driving shaft in a covering mode; and the rotation base is connected with the end part of the first positioning piece in a clamped mode. The grinding parts of the double-cylinder food grinding machine are convenient to operate and good in grinding effect.