The embodiment of the invention discloses a method for reducing the probability of learning a wrong vehicle driving linear direction and a device thereof. The method comprises the steps that when the driving state of a vehicle is judged to be the linear driving state, three-dimensional coordinates outputted by the triaxial acceleration sensor of the vehicle are acquired every first preset period of time; a first straight line for indicating the vehicle to be linearly driven is generated based on the M three-dimensional coordinates outputted by the triaxial acceleration sensor in the first period of time; a second straight line for indicating the vehicle to be linearly driven is generated based on the N three-dimensional coordinates outputted by the triaxial acceleration sensor in the second period of time; and fitting of the first straight line and the second straight line is performed so that a corrected third straight line for indicating the vehicle to be linearly driven is generated. The embodiment of the invention also discloses a corresponding device for reducing the probability of learning the wrong vehicle driving linear direction. According to the technical scheme, the correct linear direction for indicating the vehicle to be driven can be obtained so that the subsequent accuracy rate of vehicle driving state recognition is enhanced.