The invention aims to provide a photoinitiator composition suitable for a UV-LED light source. The photoinitiator composition is a photocuring composition composed of thioxanthone photoinitiator, benzoyl methyl formate and acyl phosphine oxide photoinitiator according to a ratio of 1-2:1-2:2-4. The photoinitiator composition has quite high photoinitiation efficiency under the UV-LED light source and can greatly improve the problem of bad surface drying which is common at present. The invention aims to further provide a photocuring composition with excellent performance. The photocuring composition comprises 20-40% of epoxy acrylate, 5-20% of acrylic resin containing tertiary amine structure, 20-60% of active diluent, 1-5% of photoinitiator composition, 0.5-1% of auxiliary and 0-30% of pigment.