In the mass concrete construction of ship locks，the temperature control measures are crucial to the stability of the whole concrete structure，so it is necessary to find a new temperature control method through supervision. Combining with Qianwei navigation power junction project in the Minjiang River，we expound the temperature control supervision measures in the mass concrete construction of the ship lock，including managing the concrete mixing ratio，strengthening the tracking observation，etc.，by which the construction quality of mass concrete is guaranteed. The construction experience of the project proves that the measures taken by the supervision organization effectively guarantee the construction quality of mass concrete，so it is feasible. Through flexible means of temperature control，the construction quality of ship lock mass concrete has been improved，which is worth learning from other projects.