In order to develop a class of high-quality and environmentally friendly curing agents that can completely replace traditional toxic curing agents, two glycidyl esters were prepared in this study with terephthalic acid (TPA), trimellitic anhydride (TMA), and epichlorohydrin (ECH) after open and closed loop reaction. The structures of the products were determined by 1H-NMR and FT-IR. The curing agent PT910 was prepared by compounding the above glycidyl esters according to the mass ratio of 3:1 and applied to powder coating. Compared with the traditional curing agent triglycidyl isocyanurate (TGIC), the TGA results show that the T5% of the PT910 powder coating is increased by 62.5 ℃. The mechanical property analysis shows that the impact strength of the PT910 powder coating is improved from +40 kg?cm to ±50 kg?cm, adhesion is improved from level 2 to 0 and pencil hardness is improved from HB to 3H. The aging resistance analysis show that the light retention rate of the coating increases by 5% and decreases by 2% after boiling for 2 h and UV aging for 500 h, respectively.