The utility model discloses an on -vehicle computer of car installation controlling means is embraced to fork, install the whole car live brain and adjust support 10 on computer main body fixed plate 7, a computer main body fixed plate 7, computer main body fixed plate 7 is connected with a vehicle wall mount 2 through rotatory link gear 4, and vehicle wall mount 2 is fixed on the automobile body, rotatory link gear 4 includes a rotation axis 6 of adjusting about 7 angles of computer main body fixed plate to and the left and right sides angle adjusting bolt 5 of the dead rotation axis 6 of a lock. The utility model is suitable for an on -vehicle computer installation of different grade type fork armful car or type motorcycle type, the form is novel, reasonable in design, the commonality is stronger, and it is fixed with the automobile body firmly to pass through the support with on -vehicle computer, and just nimble regulatory function has more the personalization for user?of?service provides very big facility, more shows humanized, through the aseismic design that takes precautions against earthquakes, prolongs on -vehicle computer life. The device is favorable to carrying on product standardsization and mass production.