The invention relates to an equivalent circuit for a high voltage direct current transmission converter valve based on a damping power extracting circuit. The equivalent circuit is formed by converter valve towers, wherein each converter valve tower includes at least one valve layer; each valve layer includes valve modules and saturation resistors in series; each valve module includes thyristor grade TCAs in series; each thyristor grade TCA includes a damping power extracting circuit and a thyristor which are connected in series; and the damping power extracting circuit includes a damping loop and a direct current voltage sharing and voltage detection loop. For the equivalent circuit for a high voltage direct current transmission converter valve based on a damping power extracting circuit, a single capacitor double damping power extracting loop can be looped on the basis of acquiring a damping characteristic being similar to the double damping loop, and the power extracting characteristic of TTM is greatly improved and the TTM can have the capability for high capacity of power extracting and quick power extracting at the same time; and besides, electrical wiring becomes relatively simple, and the workload for production and maintenance can be reduced.