钢箱梁又叫钢板箱形梁，是大跨径桥梁常用的结构形式。一般用在跨度较大的桥梁上，因外型像一个箱子故叫做钢箱梁。

在大跨度缆索支承桥梁中，钢箱主梁的跨度达几百米及至上千米，一般分为若干梁段制造和安装，其横截面具有宽幅和扁平的外形特点，高宽比达到1:10左右。

Steel box girder, also known as steel plate box girder, is a commonly used structural form for long-span bridges. It is called steel box girder because its shape looks like a box.

In the long-span cable-supported bridge, the span of the steel box girder reaches several hundred meters and up to a thousand meters. Generally the bridge is divided into several beam sections for manufacturing and installation, and its cross-section is wide and flat, the aspect ratio of which reaches about 1:10.