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.