Abstract: In order to identify aromatic compounds in watermelon juice and avoid the extraction methods and conditions on analysis impact in watermelon juice, the extraction time and temperature of P&T and the extraction fiber, temperature and time of SPME were optimized.At the same time, the two methods were compared on the effect of extraction.The results showed that extraction temperature 50℃ and time 30 min of P&T and extraction fiber CAR/DVB /PDMS, temperature 40℃, time 30 min of SPME could achieve the best effect of extraction.In addition, the extraction effect of SPME on watermelon juice was better than P&T.