The present invention relates to a photosensitive resin composition for a color filter and an application thereof. The photosensitive resin composition includes a pigment (A), an alkali-soluble resin (B), a compound having an ethylenically unsaturated group (C), a photo initiator (D) and an organic solvent (E). The alkali-soluble resin (B) includes a first alkali-soluble resin (B-1), and the first alkali-soluble resin (B-1) is copolymerized by a first mixture. The first mixture at least includes an ethylenically unsaturated monomer having a structure of hindered amine (b1-1), an ethylenically unsaturated monomer having an oxetanyl (b1-2) and an ethylenically unsaturated monomer having a carboxylic acid group (b1-3).