The invention relates to the technical field of transportation equipment for dangerous goods, in particular to pre-warning type dangerous goods storage tank equipment with a leak-proof groove. The pre-warning type dangerous goods storage tank equipment comprises a base arranged on a rear vehicle plate of a vehicle. A storage tank cavity is formed in the base. The rectangular leak-proof groove is formed in the periphery of the storage tank cavity. A weighing device is arranged in the storage tank cavity and connected with a weight inductor. A storage tank 1 is arranged in the storage tank cavity. The bottom face of the storage tank is in a plane shape, the outer surface of the storage tank is in an arc shape, a plurality of parallel arc-shaped grooves are formed in the surface of the storage tank, and horizontal grooves are formed in the two sides of the surface of the storage tank correspondingly. A liquid stopping convex plate is arranged on the rear end face of the storage tank. The weight inductor is connected with a programmable logic controller (PLC) through a wire, and the PLC is connected with an audible alarm arranged in a cab of the vehicle through a wire. The pre-warning type dangerous goods storage tank equipment has the advantages of being simple in structure and convenient to mount, fundamentally preventing unforeseen circumstances, protecting environmental sanitation and the like.