1、請到pyqt的官網下載對應的pythone版本:
官網下載地址:https://sourceforge.net/projects/pyqt/rss?path=/
登錄后如下圖選擇對應的版本號下載

2、點擊運行exe 程序,一直默認安裝步驟即可
3、驗證是否安裝成功,進入cmd命令
C:\Users\Administrator>python Python 2.7.10 (default, May 23 2015, 09:40:32) [MSC v.1500 32 bit (Intel)] on wi n32 Type "help", "copyright", "credits" or "license" for more information. >>> import PyQt4 >>>
