Mercury-containing waste pretreatment device

The utility model belongs to the technical field of mercury catalyst production, and particularly discloses a mercury-containing waste pretreatment device which comprises a reaction kettle, a stirring mechanism used for stirring raw materials in the reaction kettle and a crushing mechanism used for treating mercury-containing waste, the crushing mechanism comprises a crushing box and two roller teeth, and the crushing box is arranged at the top end of the reaction kettle; a communicating pipe is communicated between the bottom end of the crushing box and the top end of the reaction kettle, the two roller teeth are arranged in the crushing box, the two roller teeth are meshed, the rotation directions of the two roller teeth are opposite, and a feeding hopper is arranged at the top end of the crushing box. Before the mercury-containing waste is added into the reaction kettle, the caked mercury-containing waste can be crushed, so that mercuric chloride contained in the mercury-containing waste can fully react, a