北京同步辐射装置（BSRF）小角X射线散射（SAXS）实验中，非原位样品的测量通常占据较大比重。使用传统承载单个样品的样品架，实验效率低。本工作设计了一款用于同步辐射SAXS实验的自动换样装置，它一次可承载10个样品，使用无线遥控器在实验棚屋外即可遥控样品的移动、对光和曝光，提高了实验效率。本文简要介绍该装置的基本结构、功能及应用。

In the small angle X-ray scattering (SAXS) experiment of Beijing Synchrotron Radiation Facility (BSRF), the measurement of non-in-situ samples usually occupies a large proportion. The experimental efficiency is low by using the traditional sample holder which carries a single sample at a time. In this work, an automatic sample changing device is designed for SAXS experiment at synchrotron radiation facility. It can carry ten samples at a time, and the sample movement, light alignment and exposure can be operated by wireless remote control outside the experimental hutch, which increases the experimental efficiency. This paper briefly introduces the basic structure, function and application of the device.