A food processor, comprising: a feed opening; a grinding component comprising a first barrel body, wherein the first barrel body of the grinding component is communicated with the feed opening; an extrusion component which comprises a second barrel body and an extrusion device rotationally installed in the second barrel body, wherein the second barrel body is communicated with the first barrel body through a communication opening, and the extrusion device is matched with the inner side wall of the second barrel body for extruding juice and discharging residues; and a host component on which the grinding component and the extrusion component are installed and which comprises a driving component, wherein the driving component is used for driving the spiral blade of the grinding component to crush the food and is used for driving the extrusion device to extrude juice and discharge residues, wherein the driving component comprises: a motor on which a motor shaft is arranged; a transmission component which at least comprises: a first transmission part which is in driving connection with the motor shaft, wherein a first driving shaft is arranged on the first transmission part, and the first driving shaft is connected with the spiral blade and is used for driving the spiral blade to crush the food; and a second transmission part which is in driving connection with the motor shaft, wherein a second driving shaft is arranged on the second transmission part, and the second driving shaft is connected with the extrusion device and is used for driving the extrusion device to extrude juice and discharge residues; characterized in that a spiral blade comprises a spiral blade body which comprises a feeding area used for feeding, a grinding area connected with the feeding area and a discharging area connected with the grinding area; and wherein a plurality of spiral ribs are arranged on the grinding area, and a cleaning structure is arranged on the discharging area, which spiral blade is rotationally installed in the first barrel body, and is matched with the first barrel body to crush the food, that a rotating speed ratio of the first driving shaft to the second driving shaft is C, and the value of the rotating speed ratio C is: 0.8≤C≤1.5, that the height ratio of the feeding area to the grinding area is A, the value of the height ratio A is: 0.5≤A≤0.75, the height ratio of the grinding area to the discharging area is B, and the value of the height ratio B is: 1/30≤B≤1/15, and that the projection width L3 of the communication opening on the axial direction of the extrusion device is within the range of 2 mm to 19 mm. a feed opening; a grinding component comprising a first barrel body, wherein the first barrel body of the grinding component is communicated with the feed opening; an extrusion component which comprises a second barrel body and an extrusion device rotationally installed in the second barrel body, wherein the second barrel body is communicated with the first barrel body through a communication opening, and the extrusion device is matched with the inner side wall of the second barrel body for extruding juice and discharging residues; and a host component on which the grinding component and the extrusion component are installed and which comprises a driving component, wherein the driving component is used for driving the spiral blade of the grinding component to crush the food and is used for driving the extrusion device to extrude juice and discharge residues, wherein the driving component comprises: a motor on which a motor shaft is arranged; a transmission component which at least comprises: a motor on which a motor shaft is arranged; a transmission component which at least comprises: a first transmission part which is in driving connection with the motor shaft, wherein a first driving shaft is arranged on the first transmission part, and the first driving shaft is connected with the spiral blade and is used for driving the spiral blade to crush the food; and a second transmission part which is in driving connection with the motor shaft, wherein a second driving shaft is arranged on the second transmission part, and the second driving shaft is connected with the extrusion device and is used for driving the extrusion device to extrude juice and discharge residues; characterized in that a spiral blade comprises a spiral blade body which comprises a feeding area used for feeding, a grinding area connected with the feeding area and a discharging area connected with the grinding area; and wherein a plurality of spiral ribs are arranged on the grinding area, and a cleaning structure is arranged on the discharging area, which spiral blade is rotationally installed in the first barrel body, and is matched with the first barrel body to crush the food, that a rotating speed ratio of the first driving shaft to the second driving shaft is C, and the value of the rotating speed ratio C is: 0.8≤C≤1.5, that the height ratio of the feeding area to the grinding area is A, the value of the height ratio A is: 0.5≤A≤0.75, the height ratio of the grinding area to the discharging area is B, and the value of the height ratio B is: 1/30≤B≤1/15, and that the projection width L3 of the communication opening on the axial direction of the extrusion device is within the range of 2 mm to 19 mm.