Abstract: The process system of nature gas platform is to separate, filtrate, purify and dehydrate the nature gas explored, and make the natural gas reaches the requirements of pipeline transportation. To take full advantage of the resources on the platform and reduce energy consumption, the process system of gas platform is optimized： adding the venting system in the outlet of TEG dehydration unit, using heat energy of gas compressor to improve the dehydration effect of TEG, and adding a pipeline to connect the subsea pipeline inlet and fuel gas system inlet. This optimization can not only improve the practicability of the platform, and can save energy and reduce emission.