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, at least a portion of the driving mechanism being mounted in the housing ; 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 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 ; characterized in that a slope is disposed on the ice-discharging plate at a position adjacent to the ice-discharging port and along a rotary ice discharge direction, and the slope is located on an ice discharge side of the ice-discharging plate and disposed uphill; wherein the first portion is provided with a first step portion and a second step portion apart in an axial direction of the ice bucket , a backing ring is provided between the ice bucket and the first portion , the backing ring has a flanging at one end, the flanging abuts against the first step portion , and the other end of the backing ring abuts against the second step portion . a housing assembly comprises a housing and an ice bucket supported in the housing ; a driving mechanism for driving the ice bucket to rotate, at least a portion of the driving mechanism being mounted in the housing ; 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 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 ; characterized in that a slope is disposed on the ice-discharging plate at a position adjacent to the ice-discharging port and along a rotary ice discharge direction, and the slope is located on an ice discharge side of the ice-discharging plate and disposed uphill; wherein the first portion is provided with a first step portion and a second step portion apart in an axial direction of the ice bucket , a backing ring is provided between the ice bucket and the first portion , the backing ring has a flanging at one end, the flanging abuts against the first step portion , and the other end of the backing ring abuts against the second step portion . <EOS>