The present invention provides a method for preparing a film comprising tasteless donepezil free base uniformly dispersed therein and having a suitable thickness and size, as well as flexibility providing good handling stability and being not prone to breaking. The present invention also provides a donepezil free base-containing film prepared from the method.本發明提供一種用於製備一種膜之方法,該膜包含均勻地分散於其中的無味的多奈哌齊游離鹽基,及具有一種適宜的厚度及大小、以及提供良好的搬運穩定性且不易於折斷之撓性。本發明亦提供一種從該方法中製備的含有多奈哌齊游離鹽基之膜。