A washing apparatus, wherein the washing apparatus has an inner tub or an inner cylinder, a micro-bubble spray head for generating micro-bubble water, a detergent box, a first water inflow valve, and a second water inflow valve, wherein the micro-bubble spray head comprises a one-piece spray pipe, and a micro-bubble bubbler fixed at an outlet end of the one-piece spray pipe; wherein a diameter-decreased conical passage part is arranged in the one-piece spray pipe, an at-least-one-stage diameter-decreased conical passage is formed in the diameter-decreased conical passage part in a water flow direction, and a spray hole is formed at a downstream end of the diameter-decreased conical passage part; the spray hole is configured such that a water flow pressurized by the at-least-one-stage diameter-decreased conical passage generates a negative pressure in the one-piece spray pipe after being expanded and sprayed from the spray hole; wherein the washing apparatus is configured to: determine a total set value of a water inflow amount of the washing apparatus based on objects to be washed, after the washing apparatus is started; open a first water inflow valve of the washing apparatus to inject the micro-bubble water; open a second water inflow valve of the washing apparatus to inject non-micro-bubble water, when a water inflow amount of the micro-bubble water reaches a first set value; and complete a water inflow process of the washing apparatus when the water inflow amount of the washing apparatus reaches the total set value and characterized in that the washing apparatus further comprises: an air inflow passage is arranged on the one-piece spray pipe and is positioned such that air can be sucked into the one-piece spray pipe through the air inflow passage by means of the negative pressure and mix with the water flow to produce bubble water; and when the bubble water passes through the micro-bubble bubbler, the micro-bubble water is formed; and wherein the micro-bubble bubbler comprises a hole mesh and a hole mesh skeleton, and the hole mesh is attached to the outlet end of the one-piece spray pipe through the hole mesh skeleton, wherein an inner wall of the hole mesh skeleton is provided with internal threads to mesh with external threads on the outer wall of the outlet end and wherein a set gap is reserved between the meshing external threads and internal threads to allow air to be sucked into the one-piece spray pipe through the gap. wherein the micro-bubble spray head comprises a one-piece spray pipe, and a micro-bubble bubbler fixed at an outlet end of the one-piece spray pipe; wherein a diameter-decreased conical passage part is arranged in the one-piece spray pipe, an at-least-one-stage diameter-decreased conical passage is formed in the diameter-decreased conical passage part in a water flow direction, and a spray hole is formed at a downstream end of the diameter-decreased conical passage part; the spray hole is configured such that a water flow pressurized by the at-least-one-stage diameter-decreased conical passage generates a negative pressure in the one-piece spray pipe after being expanded and sprayed from the spray hole; wherein the washing apparatus is configured to: determine a total set value of a water inflow amount of the washing apparatus based on objects to be washed, after the washing apparatus is started; open a first water inflow valve of the washing apparatus to inject the micro-bubble water; open a second water inflow valve of the washing apparatus to inject non-micro-bubble water, when a water inflow amount of the micro-bubble water reaches a first set value; and complete a water inflow process of the washing apparatus when the water inflow amount of the washing apparatus reaches the total set value and characterized in that the washing apparatus further comprises: an air inflow passage is arranged on the one-piece spray pipe and is positioned such that air can be sucked into the one-piece spray pipe through the air inflow passage by means of the negative pressure and mix with the water flow to produce bubble water; and when the bubble water passes through the micro-bubble bubbler, the micro-bubble water is formed; and wherein the micro-bubble bubbler comprises a hole mesh and a hole mesh skeleton, and the hole mesh is attached to the outlet end of the one-piece spray pipe through the hole mesh skeleton, wherein an inner wall of the hole mesh skeleton is provided with internal threads to mesh with external threads on the outer wall of the outlet end and wherein a set gap is reserved between the meshing external threads and internal threads to allow air to be sucked into the one-piece spray pipe through the gap. an air inflow passage is arranged on the one-piece spray pipe and is positioned such that air can be sucked into the one-piece spray pipe through the air inflow passage by means of the negative pressure and mix with the water flow to produce bubble water; and when the bubble water passes through the micro-bubble bubbler, the micro-bubble water is formed; and wherein the micro-bubble bubbler comprises a hole mesh and a hole mesh skeleton, and the hole mesh is attached to the outlet end of the one-piece spray pipe through the hole mesh skeleton, wherein an inner wall of the hole mesh skeleton is provided with internal threads to mesh with external threads on the outer wall of the outlet end and wherein a set gap is reserved between the meshing external threads and internal threads to allow air to be sucked into the one-piece spray pipe through the gap.