The Qianwei navigation and hydropower project of the Minjiang River is the third of the four cascades in the recent channelization of the Leyi section of the Minjiang River. It plays an important role in the development of Minjiang shipping and river basin economy. In order to ensure the safety of ships passing the lock during the dry season period，we apply the actual ship test to determine the navigable current conditionsof the upper and lower approach channels of the ship lock navigable current conditions and ship navigation posture and other relevant parameters，analyze the feasibility and safety of navigable locks during the dry season period.The results show that the ship can basically enter and exit the ship lock safely，there is no bad flow state of the shi plock’s filling and discharging water，and the ship’s mooring force meets the requirements. However，the sloped current in the downstream entrance area of shiplock is large，so the ship should be steered cautiously，and the navigation should be suspended if necessary.