除了明显的打字错误（我相信你指的是QScrollArea），我看不出你发布的内容有什么问题，所以问题一定出在代码的其他地方：可能是缺少布局？只是为了确保我们在同一页上，下面的最小脚本对我来说就像预期的那样：

蛋白质Qt5

from PyQt5 import QtWidgets

class Window(QtWidgets.QWidget):
    def __init__(self, val):
        super().__init__()
        mygroupbox = QtWidgets.QGroupBox('this is my groupbox')
        myform = QtWidgets.QFormLayout()
        labellist = []
        combolist = []
        for i in range(val):
            labellist.append(QtWidgets.QLabel('mylabel'))
            combolist.append(QtWidgets.QComboBox())
            myform.addRow(labellist[i],combolist[i])
        mygroupbox.setLayout(myform)
        scroll = QtWidgets.QScrollArea()
        scroll.setWidget(mygroupbox)
        scroll.setWidgetResizable(True)
        scroll.setFixedHeight(200)
        layout = QtWidgets.QVBoxLayout(self)
        layout.addWidget(scroll)

if __name__ == '__main__':

    app = QtWidgets.QApplication(['Test'])
    window = Window(12)
    window.setGeometry(500, 300, 300, 200)
    window.show()
    app.exec_()

蛋白质Qt4

from PyQt4 import QtGui

class Window(QtGui.QWidget):
    def __init__(self, val):
        QtGui.QWidget.__init__(self)
        mygroupbox = QtGui.QGroupBox('this is my groupbox')
        myform = QtGui.QFormLayout()
        labellist = []
        combolist = []
        for i in range(val):
            labellist.append(QtGui.QLabel('mylabel'))
            combolist.append(QtGui.QComboBox())
            myform.addRow(labellist[i],combolist[i])
        mygroupbox.setLayout(myform)
        scroll = QtGui.QScrollArea()
        scroll.setWidget(mygroupbox)
        scroll.setWidgetResizable(True)
        scroll.setFixedHeight(200)
        layout = QtGui.QVBoxLayout(self)
        layout.addWidget(scroll)

if __name__ == '__main__':

    app = QtGui.QApplication(['Test'])
    window = Window(12)
    window.setGeometry(500, 300, 300, 200)
    window.show()
    app.exec_()