1. An intelligent traffic safety decision method based on comprehensive state detection, which is to supply an alarm information for a driver in the process of driving, wherein Firstly an influence of a person condition is considered, when t relative >t dr , first alarm information is not triggered, otherwise the first alarm information is triggered, wherein t relative = r relative v relative ; Secondly a vehicle condition is considered, When a relative = v relative t relative = v relative 2 2 ⁢ r relative < a brake , second alarm information is not triggered, otherwise the second alarm information is triggered, where an influence of a road condition is further considered, the second alarm information is not triggered, when v relative 2 2 ⁢ r relative < k gradient ⁢ k crooked ⁢ a brake ; Where, r relative is a relative distance reference value between the front single-target barrier and the vehicle v relative is a relative speed reference value between the front single-target barrier and the vehicle, t dr is a time value to reflect the driver's capability, a brake is an acceleration value of braking, k gradient is a gradient influencing coefficient, and k crooked is a camber influencing coefficient.