The invention discloses a civil aviation airborne cockpit clock. The civil aviation airborne cockpit clock comprises a control assembly (100), a display assembly (200) and a power supply assembly (300), wherein the power supply assembly (300) is used for supplying needed voltage for the control assembly (100) and the display assembly (200), the display assembly (200) is an LCD (Liquid Crystal Display) which is provided with a backlight module, and the control assembly (100) comprises a microcontroller (110), a key module (120), a backlight regulating module (130), a clock module (140), a communication module (150), a display driving module (160) and a backlight control module (170). According to the civil aviation airborne cockpit clock disclosed by the invention, the local time and the UTC (Universal Time Coordinated) time can be switched, the civil aviation airborne cockpit clock can be in communication with an airplane control system and other airborne devices, the self-calibration can be carried out, the brightness of a display screen can be regulated, the endurance timing and the stopwatch timing can be carried out, the display power consumption is less, the timing accuracy is high, and the quick identification is easy.