Tunnel portal breaking construction equipment and construction method thereof

The invention relates to the technical field of tunnels, in particular to tunnel portal breaking construction equipment and a construction method thereof.The tunnel portal breaking construction equipment comprises a storage device and a spray head device, the storage device is provided with a containing groove, a water bomb is arranged in the containing groove, and a first pipeline is arranged at one end of the containing groove; a channel is arranged in the spray head device, the channel is connected with the storage device through the first pipeline, and the water bomb is sprayed to an area needing to be blasted through the spray head device; wherein the channel comprises an extrusion section, the diameter of the extrusion section is smaller than that of the water bomb, and the water bomb is crushed into fragment water bombs through the extrusion section. According to the method, the water bomb type water jet construction equipment is used for grooving the area needing to be blasted, so that the grating arc