The invention discloses a laser fog lamp with a vehicle distance safety function. A red light semiconductor laser device is applied to an automobile fog lamp, and a bright red triangular light region in a shape similar to a triangular warning board for automobile parking can be produced in the back of an automobile in a foggy weather. The laser fog lamp is arranged at the tail portion o the automobile and consists of a circuit control module, a laser module, a reshaping optical module, a temperature control module, a relative speed measuring module and a laser module angle adjustor. The circuit control module is connected with the laser module, a reshaping optical module device is arranged in front of a laser lamp of the laser module, and the output end of the relative speed measuring module is connected with the laser module angle adjustor. A large-size laser red triangle of the laser fog lamp has the warning effect better than a traditional fog lamp, vehicle early-warning distance is increased remarkably, and driving safety guarantee is improved.