The invention discloses and provides a triangular wave generation circuit used for an active power filter, which is simple, stable, low in cost and easy to implement. The triangular wave generation circuit comprises a triangular wave fundamental wave generation circuit, a triangular wave form amplification circuit and a triangular wave driving enhancement circuit, wherein the triangular wave fundamental wave generation circuit comprises an integrated circuit (U1) and a peripheral circuit; the triangular wave form amplification circuit comprises a first operational amplifier circuit (U2A) and a peripheral circuit; and the triangular wave driving enhancement circuit comprises a second operational amplifier circuit (U2B) and a peripheral circuit. According to the triangular wave generation circuit, each part of the circuit has definite functions and is easy to implement; through the circuit parts, such as the triangular wave fundamental wave generation circuit, the triangular wave form amplification circuit and the triangular wave driving enhancement circuit, generation of the triangular wave is realized; the triangular wave generation circuit has the advantages of few components, simple circuit, good stability, high safety and easiness in popularization and marketing; and the circuit is simple and reliable, and the control difficulty and the cost of the equipment are reduced.