Biogas raw material pretreatment device

The utility model discloses a biogas raw material pretreatment device, which relates to the technical field of biogas, and comprises a crushing box and a spraying mechanism, a crushing mechanism is arranged on the upper side in the crushing box, a feed port is arranged on one side of the crushing box, the spraying mechanism comprises a mixing cylinder and a liquid guide pipe, one end of the mixing cylinder is provided with a water inlet and a bacterial liquid interface, and the other end of the mixing cylinder is provided with a liquid outlet. A rotatable stirrer is arranged in the smashing box, the liquid outlet is communicated with an inner cavity of the liquid guide pipe, the liquid guide pipe is provided with a plurality of sprayers in the length direction of the liquid guide pipe, and the output ends of the sprayers are communicated with an inner cavity of the smashing box and located on the lower side of the smashing mechanism. Due to the arrangement of the spraying mechanism, the solution is sprayed on