Automobile cruise automatic control method

The invention provides an automobile cruise automatic control method. The method comprises the steps of S1, setting a cruise speed Vs and a cruise control transition area (Vs-Vm, Vs+Vm'), and inputting a control signal to enter a cruise control mode; S2, by a cruise controller, acquiring a current automobile speed V and judging an automobile speed change condition; if the current automobile speed V is changed from less than Vs-Vm to the cruise control transition area (Vs-Vm, Vs+Vm'), by the cruise controller, calculating an accelerator proportion coefficient k according to a first curve; if the current automobile speed V is changed from more than Vs-Vm to the cruise control transition area (Vs-Vm, Vs+Vm'), by the cruise controller, calculating the accelerator proportion coefficient k according to a second curve, wherein the x-coordinate of the first curve and the second curve is the current automobile speed V, the y-coordinate of the first curve and the second curve is the accelerator proportion coefficient k