The invention relates to an embedded pole of a power transmission and distribution breaker, and belongs to the technical field of power transmission and distribution switch gears. According to the technical scheme, an injection-molded embedded pole structurally comprises an upper insert, a lower insert, a vacuum arc-extinguishing chamber, an insulating shell and a base, wherein the base is provided with a base insert; the vacuum arc-extinguishing chamber also comprises an upper cover of the arc-extinguishing chamber and a lower cover of the arc-extinguishing chamber; the upper cover of the arc-extinguishing chamber and a wafer-type metal lower cover of the arc-extinguishing chamber seal a main body of a ceramic arc-extinguishing chamber; an upper sealing cover of the arc-extinguishing chamber is provided with an upper cover connector; the arc-extinguishing chamber is fixed on the upper insert; a bolt form can be adopted by the upper cover connector; and a corresponding screw hole is formed in the upper cover of the arc-extinguishing chamber. Good electrical property, mechanical property and flame retardant property and high production efficiency can be achieved through once injection molding; the embedded pole which has a flame-retardant function and is beneficial to recycling of resources and environmental protection, and of which the material can be recycled after being produced and used can be prepared.