An ice crushing device, comprising: a housing assembly comprises a housing and an ice bucket supported in the housing; a driving mechanism for driving the ice bucket to rotate; an ice crushing mechanism disposed in the ice bucket; the housing assembly further comprises an ice-discharging plate provided at a bottom of the ice bucket, the ice-discharging plate is provided with an ice-discharging port communicated with the ice bucket, ice cubes prepared by an ice maker are discharged out of the ice-discharging port after being crushed in the ice bucket by the ice crushing mechanism, wherein the ice crushing mechanism comprises an ice cutter shaft fixed with respect to the housing, and several movable ice cutters (52,52a) and several fixed ice cutters disposed on the ice cutter shaft at an interval, wherein the driving mechanism comprises a motor and a cylindrical gear driven by the motor, an outer circumference of the ice bucket is provided with external teeth, and the cylindrical gear meshes with the external teeth to drive the ice bucket to rotate; wherein the housing comprises a first portion that houses the ice bucket and a second portion in which the driving mechanism is mounted, the first portion is configured to match the outer circumference of the ice bucket, an opening is provided on the first portion, and a meshing portion of the cylindrical gear and the external teeth is located at the opening; and wherein the housing assembly further comprises a bottom plate, a bottom of the second portion is open, the bottom plate covers the bottom of the second portion to seal the cylindrical gear between the second portion and the bottom plate, characterized in that each movable ice cutter comprises three blades evenly distributed in the circumferential direction, the ice crushing mechanism further comprises three ice agitating rods connected to the ice cutter shaft, the three ice agitating rods are connected to at one end of the ice cutter shaft away from the ice-discharging port, the three ice-agitating rods are fixed corresponding one to one with the three blades and relative to the circumferential direction, and at least one of the blades or one of the ice agitating rods is fixed relative to circumferential direction of the ice bucket; wherein the bottom of the ice-discharging plate is provided with a clamping slot, and a portion of the bottom plate is snap fitted in the clamping slot. a housing assembly comprises a housing and an ice bucket supported in the housing; a driving mechanism for driving the ice bucket to rotate; an ice crushing mechanism disposed in the ice bucket; the housing assembly further comprises an ice-discharging plate provided at a bottom of the ice bucket, the ice-discharging plate is provided with an ice-discharging port communicated with the ice bucket, ice cubes prepared by an ice maker are discharged out of the ice-discharging port after being crushed in the ice bucket by the ice crushing mechanism, wherein the ice crushing mechanism comprises an ice cutter shaft fixed with respect to the housing, and several movable ice cutters (52,52a) and several fixed ice cutters disposed on the ice cutter shaft at an interval, wherein the driving mechanism comprises a motor and a cylindrical gear driven by the motor, an outer circumference of the ice bucket is provided with external teeth, and the cylindrical gear meshes with the external teeth to drive the ice bucket to rotate; wherein the housing comprises a first portion that houses the ice bucket and a second portion in which the driving mechanism is mounted, the first portion is configured to match the outer circumference of the ice bucket, an opening is provided on the first portion, and a meshing portion of the cylindrical gear and the external teeth is located at the opening; and wherein the housing assembly further comprises a bottom plate, a bottom of the second portion is open, the bottom plate covers the bottom of the second portion to seal the cylindrical gear between the second portion and the bottom plate, characterized in that each movable ice cutter comprises three blades evenly distributed in the circumferential direction, the ice crushing mechanism further comprises three ice agitating rods connected to the ice cutter shaft, the three ice agitating rods are connected to at one end of the ice cutter shaft away from the ice-discharging port, the three ice-agitating rods are fixed corresponding one to one with the three blades and relative to the circumferential direction, and at least one of the blades or one of the ice agitating rods is fixed relative to circumferential direction of the ice bucket; wherein the bottom of the ice-discharging plate is provided with a clamping slot, and a portion of the bottom plate is snap fitted in the clamping slot.