The present invention relates to a photosensitive resin composition for a color filter and an application of the same. The photosensitive resin composition includes an alkali-soluble resin (A), a compound (B) having an ethylenically unsaturated group, a photoinitiator (C), an organic solvent (D) and a pigment (E). The alkali-soluble resin (A) includes a first alkali-soluble resin (A-1) having the structure represented by formula (1). The aforementioned photosensitive resin composition is advantageously applied for the color filer with better contrast.