A smart pet collar includes a chest strap body, a hardware holder, and a smart hardware body. The hardware holder is locked to the chest strap body; the smart hardware body is installable into the hardware holder; the hardware holder has a latching element for latching the smart hardware body; the hardware holder has a connecting terminal child-and-mother seat corresponsive to the smart hardware body; the chest strap body includes a flexible printed circuit component; and the flexible printed circuit component has LED luminous bodies packaged by a resin. The invention has the features of powerful function, simple structure, reasonable design, and detachable components to facilitate use without affecting the pet's wearing comfortability. With the detachable structure, the tensile strength of the chest strap body is enhanced. The invention also has the effects of improving the product quality, lowering the production cost, and providing good applications.
