The fuel saving principle of economic driving mode was studied, the control logic and calibration was described and finally the control strategy was integrated into ECU/TCU software. Then the matching and calibration of control parameters were conducted on a SUV vehicle. The experimental results show that the fuel saving effect of the mode is obvious in NEDC cycle and can save 4.45% on average for four cars. In order to meet the requirements of mass production, the special calibration development and test verification are conducted to improve performance characteristics such as atmospheric emission, power, OBD and drivability. It is found that the recalibrated emission and OBD performance in economic driving mode can meet the legislation requirements and the power and drivability can meet the requirements of customer and mass production.