"特种宽银幕电影" can be translated as "special wide-screen film" or "specialty wide-screen cinema" in English.
"Special" here emphasizes the unique or distinctive nature of the wide-screen format.
"Wide-screen" directly refers to the wide aspect ratio of the film screen.
"Film" or "cinema" can be used to denote the medium or the art form, depending on the context.
In most cases, "special wide-screen film" would be a suitable and straightforward translation.