In order to improve the adhesive power of coating materials and Iceland crystal and increase the transmittance and bandwidth, we have designed a multiplayer structure broadband anti-reflecting coating. During the evaporating process ,we selected suitable optical film materials and used electron bundle to evaporate with ion source evaporating,so we obtained a broad and anti-reflecting film with high quality. The result of test indicates that the average reflection value is below 0.5 % and the effective bandwidth is the near infrared spectrum; the adhesive power of coating materials and Iceland crystal is firm and achieved the aim of design and improved the performance of Wollaston prism.