A triaxial angular vibration measuring method through adopting satellite-borne linear accelerometers includes the following steps: firstly, selecting a mounting plane representing the angular vibration characteristic of a to-be-measured object on the to-be-measured object; secondly, selecting a rectangle region on the mounting plane and mounting the four linear accelerometers; thirdly, collecting time-domain data of the four linear accelerometers, amplifying and filtering the data on the satellite, and downloading the data to the ground; fourthly, calculating the vibration angular acceleration of the to-be-measured object in the directions of x-axis, y-axis and z-axis; and fifthly, calculating the root-mean-square value of the vibration angular acceleration, the root-mean-square value of the vibration angular velocity and the root-mean-square value of the vibration angular displacement, so as to complete the triaxial angular vibration measurement. Through the adoption of the method provided by the invention, requirements of the sensor for the mounting plane of the satellite as well as the resource occupation of the satellite are reduced, the mounting accuracy of the sensor can be guaranteed more easily, and the realization manner is simpler.