Beidou VMS (vessel monitoring system) data contains the position and speed of fishing vessels, which can be used to mine dynamic information about fishing operations. This paper used VMS data to extract voyage number and average offshore distance of Jiangsu fishing vessels, thus analyzing the voyage number and average offshore distance of vessels in different length, type, operating date and region. The results show that: 1) The voyage number of vessels in different operation types is obviously different in Jiangsu, with that of gill net being the largest, accounting for 84.6% of the total voyages, and the average offshore distance and average operation time of vessels operating with purse net and trap net are larger, with the maximum distance of vessels operating with purse net up to 174.02km; 2) most of Jiangsu fishing vessels are small or medium-sized , and the average  offshore distance is relatively small, basically within 80km, increasing linearly with the increase of tonnage and power; 3) the voyage number is generally the largest in the middle and smallest at the beginning and end of the year, with that in April and September to November being the largest and that in February and May to July being the smallest;  4) there is a big difference in fishing industry between cities in different regions of Jiangsu, with Qidong City, Rudong County and Sheyang County having the largest voyage number, and Taicang City having the furthest average offshore distance, i.e.,332.38km. The results can provide reference for fishery management in Jiangsu.