其实就是两行代码，先看看我写的！

这是用QT Designer生成的代码，我只是在里面加上了两行自动下载FLASH插件的代码

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file ´E:wwwrootpythonDemoDemo.ui´
#
# Created: Sun Feb 19 09:05:26 2012
#      by: PyQt4 UI code generator 4.9.1
#
# WARNING! All changes made in this file will be lost!

from PyQt4 import QtCore, QtGui

try:
    _fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
    _fromUtf8 = lambda s: s

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName(_fromUtf8("MainWindow"))
        MainWindow.resize(1024, 768)
        self.centralWidget = QtGui.QWidget(MainWindow)
        self.centralWidget.setObjectName(_fromUtf8("centralWidget"))
        self.verticalLayout_2 = QtGui.QVBoxLayout(self.centralWidget)
        self.verticalLayout_2.setObjectName(_fromUtf8("verticalLayout_2"))
        self.verticalLayout = QtGui.QVBoxLayout()
        self.verticalLayout.setObjectName(_fromUtf8("verticalLayout"))
        self.webView = QtWebKit.QWebView(self.centralWidget)
        self.webSettings = self.webView.settings()
        self.webSettings.setAttribute(QtWebKit.QWebSettings.PluginsEnabled,True)
        self.webView.setUrl(QtCore.QUrl(_fromUtf8("http://xiaomizhou.net/")))
        self.webView.setObjectName(_fromUtf8("webView"))
        self.verticalLayout.addWidget(self.webView)
        self.verticalLayout_2.addLayout(self.verticalLayout)
        MainWindow.setCentralWidget(self.centralWidget)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        MainWindow.setWindowTitle(QtGui.QApplication.translate("MainWindow", u"小米粥", None, QtGui.QApplication.UnicodeUTF8))

from PyQt4 import QtWebKit

if __name__ == "__main__":
    import sys
    app = QtGui.QApplication(sys.argv)
    MainWindow = QtGui.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())

最关键的就是这两行

self.webSettings = self.webView.settings()
self.webSettings.setAttribute(QtWebKit.QWebSettings.PluginsEnabled,True)