In this study, we discussed the optical property to find the optimal condition of Te-based antireflection trilayer(ART) structure for a high density optical recording. It was found that the optical property was improved by suggesting the environmental parameters satisfied the optimum condition. As the results, the optimized(.lambda.=8.000${AA}$.) thickness of the recording layer is 27${AA}$, and the 1st and 2nd minimum ART conditions of dielectric layers are 1080${AA}$, 3820${AA}$, respectively. And the high SNR, the contrast ratio and the sensitivity are achieved by using the ART conditions.