Disclosed is a pet insect repeller, tied to the neck of a pet by a strap, comprising a housing, and a battery, a circuit board and a heating portion mounted inside the housing. The battery and a heating plate are respectively connected to the circuit board. One side of the housing is provided with a plurality of through volatilization holes. The heating portion is provided with a drug carrying member that is loaded with a biological active component. The battery is used to provide an operating current for the heating portion. After the battery is turned on, the heating portion generates heat to heat the drug carrying member. After the temperature of the drug carrying member rises, the biological active component is volatilized and diffused to the body surface of a pet through the volatilization holes. By adopting the above technical solution, there will no harm to the pet.
