The invention provides a spreading device and relates to the technical field of plate spreading. The spreading device comprises a box and a motor the box is provided with a feeding hole and a discharge hole the feeding hole and the discharge hole both are communicated with an inner cavity of the box at least one screw group is arranged in the inner cavity each screw group comprises a positive-rotation screw and a negative-rotation screw the two ends of both of the positive-rotation screw and the negative-rotation screw are in rotational connection with the box the motor drives the positive-rotation screw and the negative-rotation screw to rotate, and the rotation direction of the positive-rotation screw is opposite to that of the negative-rotation screw each of the positive-rotation screw and the negative-rotation screw comprises a first helical blade and a second helical blade, the two of which are opposite in rotation direction the first helical blade of the positive-rotation screw is opposite to the first helical blade of the negative-rotation screw in rotation direction. The spreading device is capable of evenly mixing straws with other components in raw materials so that a produced plate can be good in drilling resistance and good in toughness. The invention also provides a mixing and spreading system employing the spreading device.本發明提供了一種鋪料裝置,涉及板材鋪料技術領域。該鋪料裝置包括箱體和電機,箱體設有進料口和出料口,進料口和出料口均連通箱體的內腔,內腔設有至少一組螺桿組,每組螺桿組包括正轉螺桿和反轉螺桿,正轉螺桿和反轉螺桿的兩端均轉動連接於箱體,電機帶動正轉螺桿和反轉螺桿轉動,並且正轉螺桿的轉向與反轉螺桿的轉向相反。正轉螺桿和反轉螺桿均包括第一螺旋葉片和第二螺旋葉片,第一螺旋葉片和第二螺旋葉片的旋轉方向相反,正轉螺桿的第一螺旋葉片與反轉螺桿的第一螺旋葉片的旋轉方向相反。本發明提供的鋪料裝置能夠將原料中的秸稈與其他成分混合均勻,使製得的板材抗鑽性好、韌性好。本發明還提供了一種使用鋪料裝置的拌料鋪料系統。101‧‧‧箱體102‧‧‧電機103‧‧‧正轉螺桿104‧‧‧反轉螺桿105‧‧‧第一螺旋葉片106‧‧‧第二螺旋葉片107‧‧‧風料腔108‧‧‧離心泵109‧‧‧活動架110‧‧‧輪子111‧‧‧限位框架112‧‧‧模板框113‧‧‧行程開關201‧‧‧料桶202‧‧‧攪拌軸203‧‧‧電子磅204‧‧‧撥料條
