Abstract: Based on the typical field data, the application effects and working efficiency of laser-controlled land levelling technology were evaluated and the benefits from the application of precision land levelling technology in large scale were analysed. The results show that the application of the giant laser-controlled land levelling device can produce not only precision land levelling but also higher working efficiency which is 3 to 4 times comparing with the application of the middle-sized device. The good economic returns can be archived with combined application of large laser-controlled land levelling equipments, suitable field layout of irrigation and drainage engineering and modern agricultural machines.