The invention relates to a method of displaying caption in video that comprises: step 1, the first video dada in PS format is pretreated to generate the second video data in PS format; step 2, decoding the second video data to generate the third video data in ES format, and parameters of the second video data; step 3, the third video data and the first caption in ES format are multiplexed to generate the forth video data in ES format. The first caption data in ES format coded by the second caption data in word format based on parameter of said second video data is between Step 2 and step 3. The fifth video data which is packaged to TS format by the forth video data in ES format is included after step 3. So the invention does not decode video data in PS format, but also packages analysis and codes multiplexed data to realize the displaying caption in video conveniently.