An elastic dog chest strap includes: a back with a lining, a back strap with a buckle connected to the back, a traction connector fixed to an axis of the back, and a limiting element at a fixed end point of the traction connector Passes through the traction connector and forms a protrusion in the direction of the end point on the spinal line； further comprising a shoulder strap and at least one elastic element that passes through the traction connector at the fixed end point, The traction connector and the fixed end point can be elastically moved to a length equal to the degree of elongation of the elastic element under the restriction of the protruding portion of the restriction element.一種彈性犬用胸背帶，包括：配有襯裡的背部，配有插扣的背部帶連接於所述背部，牽引連接器固定於所述背部的軸線，限制元件在牽引連接器的被固定端點處穿過牽引連接器並在脊椎線上的端點的方向上形成突出部分；還包括肩部帶和至少一個彈性元件，該彈性元件在所述被固定端點處穿過所述牽引連接器，所述牽引連接器和被固定端點能夠在所述限制元件的突出部分的限制下彈性移動至等於所述彈性元件的伸長程度的長度。
