本文使用唐詩現地研究法，利用廣域調查所得現地資料和天文月相，分析杜甫自秦州至成都府途中所作的二十五首五言古詩，探討這些詩篇內容發生的日期。杜甫自秦州到成都府之間的旅行日期，古人已有討論，但疑點甚多，本文先對秦州出發時間提出了合理的擬測，並明確指出到達成都的日期。

This paper applies to the method of Tang poetry on-site research, using on-site, lunar phrase and astronomical informtaion I obtained through wide-range of investigations to analyze twenty-five classical poems with five-word-form Du Fu wrote along the travel from Qinzhou to Chengdou fu.There are many discussion about Du Fu's travel dates from Qinzhou to Chengdou fu, but many doubts remain. This paper firstly simulates an rational departure date, and points out a certain date Du fu arrived Chengdou.