你只需要更改css文件的 max-width ：

you only have to change the max-width of your css file:

.ui-tooltip, .qtip{
    max-width: 900px; /* Change this? */
}

在 jsfiddle

<p>
<img src="http://www.dummyimage.com/50x50/4c6aff/000000.png&text=1" data-pic="http://www.dummyimage.com/600x600/4c6aff/000000.png&text=1">
<img src="http://www.dummyimage.com/50x50/4c6aff/000000.png&text=2" data-pic="http://www.dummyimage.com/300x300/4c6aff/000000.png&text=2">
    <img src="http://www.dummyimage.com/50x50/4c6aff/000000.png&text=3" data-pic="http://www.dummyimage.com/150x150/4c6aff/000000.png&text=3">
</p>

JAVASCRIPT

JAVASCRIPT

$(function() {
    $("img").each(function() {
        $(this).qtip({
            content: {
                text: function(api) {
                    return "<img src='" + $(this).attr("data-pic") + "' class='dit'>";
                }
            }
        });
    });
});​

CSS

CSS

p {
    margin-top: 50px;
    margin-left: 100px;
}
img {
    padding: 10px;
}
.ui-tooltip, .qtip{
    max-width: 10000px; /* Change this? */
}