Based on the data collected by saury stick-held operation in the northwest Pacific from July to October in 2016 and from June to October in 2017, we analyzed the factors(fishing operations and marine environment) influencing the stick-held net status of Pacific saury(Cololabis saira) fishery based on boosting regression tree weighted analysis and generalized additive model. The results showed that: Among the factors influencing the maximum net sinking depth, the top four factors with weight are current speed of 30 m layer(20.15%), current speed of 60 m layer(18.92%), length of lead line loose(16.85%) and current speed of 10 m layer(15.52%); The top four influencing factors of lifting speed were hauling speed(23.17%), current speed of 30 m layer(20.05%), current speed of 10 m layer(18.27%) and current speed of 60 m layer(16.26%). Current speed of 30 m and 60 m layers and length of lead line loose had significant effects on the maximum net sinking depth;The maximum net sinking depth was positively correlated with the length of lead line loose, there was a negative correlation between the maximum net sinking depth and current speed of 10 m, 30 m and 60 m layers; hauling speed and current speed of 10 m, 30 m and 60 m layers had significant effects on lifting speed; the lifting speed was positively correlated with the hauling speed; there was a negative correlation between the lifting speed and current water speed. Hauling speed was the most important factor affecting the lifting speed, followed by current speed of 30 m layer, current speed of 10 m layer and current speed of 60 m layer.