The invention discloses a method and device for detecting vehicle driving direction and relates to the technical field of vehicles. The method for detecting the vehicle driving direction comprises the steps that a first acceleration value is measured from a vehicle acceleration sensor and is sent to a whole vehicle CAN network; a vehicle engine ECU calculates a second acceleration value according to the vehicle speed; the vehicle engine ECU receives the first acceleration value sent by the whole vehicle CAN network; the first acceleration value and the second acceleration value are combined and matched at the vehicle engine ECU; the vehicle driving direction is determined according to a combining and matching result. The invention further provides a corresponding device. By the adoption of the method, a vehicle can accurately know the driving direction in real time, relevant parameters in an engine control system can be adjusted in time to ensure the driving comfort performance of the vehicle. In addition, increase of additional hardware is not needed for scheme achievement, and thus the vehicle production cost is also reduced.