A protective device for a wind coal drill comprises iron plates, wherein four corners of the iron plate are connected and reinforced with the four corners of the other iron plate by four screws, nutsare arranged on the screws, and a two-inches pipe is arranged on the iron plate positioned at the front end of the wind coal drill to protect a drill bit of the wind coal drill and to prevent a rotating part of the wind coal drill from being touched during a construction process, and a wind guide groove is formed in one side of the iron plate positioned at the front end of the wind coal drill to prevent waste gas from blowing directly to a human body. The protective device for the wind coal drill is provided with high safety factor and material saving.