An air conditioner outdoor unit including: a compressor; a pipeline (3,4) through which refrigerant is sucked into or discharge from the compressor; a counterweight assembly including: a counterweight body, which is provided with an elastic receiving portion through which one of the pipeline passes and embedded therein; and a first fixing portion connected to the elastic receiving portion, which is arranged around a part of an outer wall of the pipeline to form a first contact point and a second contact point thereon; wherein the first contact point and the second contact point has a height difference forming a self-locking between the counterweight assembly and the pipeline (3,4); characterized in that: the first fixing portion is spiral and made of rigid material, which has: a first end connected to the elastic receiving portion; and a second end provided higher than the first end; when the pipeline (3,4) is embedded in the elastic receiving portion, the elastic receiving portion deforms to squeeze the first end towards the outer wall of the pipeline (3,4) forming the first contact point and the first fixing portion deforms to squeeze towards the second end towards the outer wall of the pipeline (3,4) forming the second contact point. a compressor; a pipeline (3,4) through which refrigerant is sucked into or discharge from the compressor; a counterweight assembly including: a counterweight body, which is provided with an elastic receiving portion through which one of the pipeline passes and embedded therein; and a first fixing portion connected to the elastic receiving portion, which is arranged around a part of an outer wall of the pipeline to form a first contact point and a second contact point thereon; a counterweight body, which is provided with an elastic receiving portion through which one of the pipeline passes and embedded therein; and a first fixing portion connected to the elastic receiving portion, which is arranged around a part of an outer wall of the pipeline to form a first contact point and a second contact point thereon; wherein the first contact point and the second contact point has a height difference forming a self-locking between the counterweight assembly and the pipeline (3,4); characterized in that: the first fixing portion is spiral and made of rigid material, which has: a first end connected to the elastic receiving portion; and a second end provided higher than the first end; when the pipeline (3,4) is embedded in the elastic receiving portion, the elastic receiving portion deforms to squeeze the first end towards the outer wall of the pipeline (3,4) forming the first contact point and the first fixing portion deforms to squeeze towards the second end towards the outer wall of the pipeline (3,4) forming the second contact point. a first end connected to the elastic receiving portion; and a second end provided higher than the first end; when the pipeline (3,4) is embedded in the elastic receiving portion, the elastic receiving portion deforms to squeeze the first end towards the outer wall of the pipeline (3,4) forming the first contact point and the first fixing portion deforms to squeeze towards the second end towards the outer wall of the pipeline (3,4) forming the second contact point.