A thin film transistor (TFT) array substrate includes a TFT including a drain electrode having an end configured as an auxiliary electrode, a protection layer covering the thin film transistor, a storage electrode forming on the protection layer and opposite to the auxiliary electrode, a passivation layer covering the storage electrode, and a pixel electrode formed on the passivation layer. The pixel electrode is electrically coupled to the auxiliary electrode via a hole passing through the passivation layer and the protection layer. A method of manufacturing the TFT array substrate and an associated liquid crystal display are also provided.