A smart pet collar includes a collar body, a hardware holder, and a smart hardware body. The collar body is ring shaped, the hardware holder is locked to the collar body; the smart hardware body is installable into the hardware holder; the hardware holder has a latching element for latching the smart hardware body and a connecting terminal child-and-mother seat configured to be corresponsive to the smart hardware body; and the collar body includes a flexible printed circuit component. The pet collar has the features of powerful function, simple structure, and reasonable design and detachable components to facilitate its use without affecting the pet's wearing comfortability. With the double auxiliary antenna design, the pet collar improves the capability of transmitting/receiving wireless signals, positioning precision and environmental adaptability to meet the requirements for different occasions and environments without increasing the volume or quantity of components of the pet collar.
