是KnockOut支持递归模板，因此您可以在模板中引用和渲染相同的模板。
在您的案例中，示例html如下所示：

<script id="formElementNodeTemplate" type="text/html">
<ul>
    <li>Parent <span data-bind="text: text"></span> 
               <span data-bind="text: value"></span>
        <br/>
        Children:
        <!-- ko template: { name: 'formElementNodeTemplate',  
                            foreach: children } -->
        <!-- /ko -->        
     </li>
   </ul>
</script>    

<div data-bind="template: { name: 'formElementNodeTemplate', data: $data }">
</div>

演示JSFiddle.

我想，我有一个小更好的解决方案，没有树根（或者我猜有多个树根）。请看：
http://jsfiddle.net/nonsense66/Bzekr/

模板：

<script id="treeElement" type="text/html">
    <li>
        <span data-bind="text: name"></span>
        <ul data-bind="template: { name: 'treeElement', foreach: children }">
        </ul>
     </li>
</script>    

<ul data-bind="template: { name: 'treeElement', foreach: $data.treeRoot }"></ul>

Javascript语言：

var viewModel = {
    treeRoot: ko.observableArray()
};

var TreeElement = function(name, children) {
   var self = this;
   self.children = ko.observableArray(children);
   self.name = ko.observable(name);
}

var tree = [
    new TreeElement("Russia", [
        new TreeElement("Moscow")
    ]),
    new TreeElement("United States", 
    [
        new TreeElement("New York", [ 
            new TreeElement("Harlem"),
            new TreeElement("Central Park")
        ]) 
    ])
];

viewModel.treeRoot(tree);

ko.applyBindings(viewModel);

希望能有所帮助！

这篇文章对我有很大的帮助。我一直在寻找新的方法来使用knockout。我只是想添加一个有用的修改，这就是做什么nemesv建议只使用ko.mapping插件。

//Nested javascript object:
var formElementNode = {
    children: [{
        children: [],
        text: 'Child1',
        value: 'Value1'
    }, {
        children: [{
            children: [{
                children: [],
                text: 'Child2.1.1',
                value: 'Value2.1.1'
            }],
            text: 'Child2.1',
            value: 'Value2.1'
        }],
        text: 'Child2',
        value: 'Value2'
    }, {
        children: [],
        text: 'Child3',
            value: 'Value3'
    }],
    text: 'Main',
    value: 'MainValue'
};

//Use ko.mapping to generate viewModel:
var viewModel = ko.mapping.fromJS(formElementNode);
ko.applyBindings(viewModel);

如本jsFiddle所示。

递归自定义绑定

另一个解决方案是，在阅读到模板速度较慢后，我考虑使用递归绑定。
<ul data-bind="nestMe: name"></ul>

ko.bindingHandlers.nestMe = {
    init: function(element, valueAccessor, allBindings, viewModel, bindingContext) {

    },
    update: function(element, valueAccessor, allBindings, viewModel, bindingContext) {
        var observable = valueAccessor() || { };
        var unwrapped = ko.unwrap(observable);

        ko.utils.setHtml(element, '<li>'+unwrapped+'<ul data-bind="foreach: children"><li data-bind="nestMe: name" /></ul></li>');

    }
};

var rootModel = function(name, children) {
    this.name = ko.observable(name);
    this.children = ko.observableArray(children);
};

var basemodel = new rootModel('test');
basemodel.children.push(new rootModel('aaa',[new rootModel('111'),new rootModel('222')]));
basemodel.children.push(new rootModel('bbb'));
basemodel.children.push(new rootModel('ccc',[new rootModel('333'),new rootModel('444')]));

ko.applyBindings(basemodel);

在递归之前有机会处理数据应该会派上用场。
JSFiddle