import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from PyQt5.QtWebEngineWidgets import *


class MainWindow(QMainWindow):
    def __init__(self):
        super(MainWindow, self).__init__()
        self.setWindowTitle('范例')
        self.setGeometry(100, 100, 1024, 768)
        self.browser = QWebEngineView()
        self.browser.load(QUrl('https://www.baidu.com'))
        self.setCentralWidget(self.browser)


if __name__ == '__main__':
    app = QApplication(sys.argv)
    win = MainWindow()
    win.show()
    app.exit(app.exec_())

就这么点代码，超简单吧