Power-down delay system of automobile controller

The utility model discloses a power-down delay system of an automobile controller. The power-down delay system comprises the controller, a power-down delay circuit (4) and a filtering voltage division circuit II (11), wherein the controller comprises a controller power module (7), a CPU (central processing unit) (12) and a controller other function circuit module (3); a 24V power supply (1) of a whole automobile is connected with the controller power module (7); the input end of the power-down delay circuit (4) is connected with a key ON-position switch (2); the output end of the power-down delay circuit (4) is connected with the CPU (12); the controller power module (7) is connected with the input end of the CPU (12); the input end of the filtering voltage division circuit II (11) is connected with the key ON-position switch (2); the output end of the filtering voltage division circuit II (11) is connected with the CPU (12); the controller other function circuit module (3) is connected with the controller power module (7) and the ground respectively. The power-down delay system is simple in structure and realizes a power-down delay function of the controller.