The vibration of the cab of the allterrain vehicle (ATV) mobile platform greatly influences driver comfort and equipment stability. A method for quantitatively evaluating vibration of the ATV mobile platform and its cab is established based on the ISO2631 and ISO5349 criteria. The method is used to evaluate the vibration of the contrast and prototype ATV mobile platforms subjected to road tests. The test results show that the contrast vehicle was superior to the prototype vehicle in several ways, including cab vibration, driver comfort, platform vibration, and proper equipment use. Analysis of the differences may guide ATV development.