Resist composition and its preparation method, the color filter substrate and a display device

The present invention relates to display technology, and particularly relates to a method for preparing a resist composition and a color filter substrate and a display device. The resist composition, comprising a mass fraction of from 1% to 10% of the microcapsules, the microcapsule wall include alkali-insoluble resin, a microcapsule comprising a capsule core: mass fraction of 10% to 60% may be an unsaturated photocurable resin oligomer; mass fraction of 10% to 50% of the photopolymerizable monomer; mass fraction of 10% to 70% of the first black pigment paste; mass fraction of 0.1% to 10% a first photo-polymerization initiator; mass fraction of 0.1% to 5% of coupling agent. Aspect of the present invention, may be implemented at the repair damaged black matrix, greatly improved product yield.