你试试把中文路径换掉 不行的话参考 逝去的青春的博客：
Eclipse出现“The Eclipse executable launcher was unable to locate its companion shared library”错误的解决方法如下：
   一、打开eclipse目录下的配置文件eclipse.ini。
   二、将--launcher.library和-startup下面的路径都改为当前的正确路径。 如我的eclipse的存放路径由D:\Program Files\改为D:\，则将路径里eclipse前的“Program Files\”去掉即可。
如果要在eclipse打开时显示工作路径对话框,则有两种解决方法：
方法一、关闭Eclipse并打开eclipse的安装目录，依次打开以下目录，configuration\.settings文件夹下有一个文件org.eclipse.ui.ide.prefs，用记事本打开，将下列红色字符改为true即可：SHOW_WORKSPACE_SELECTION_DIALOG=true
方法二、设置方法如下：依次打开Window -> Preferences -> General -> Startup and Shutdown 。然后勾选Confirm exit when closing last window复选框即可。或者点击Restore Defaults按钮。 *********************************************************************************************************** 下面这个跟你的问题比较像：摘自kiwi‘s garden的博客 The Eclipse executable launcher was unable to locate its companion launcher jar的解决方法    To resolve this issue perform the following steps: Go to the installation location (for example, C:/Program Files/IBM/TeamConcert) Copy the eclipse.ini file to a backup file (such as eclipse.ini.bak). Edit the eclipse.ini file and remove these two lines: -startup plugins/org.eclipse.equinox.launcher_1.0.100.v20080509-1800.jar Start the Rational Team Concert client again.
大概就是说在安装目录里找到eclipse.ini 然后移除以下两行:    -startup    plugins\org.eclipse.equinox.launcher_1.0.100.v20080509-1800.jar