The invention discloses a composite board and a production method thereof, and relates to the field of building materials. The composite board comprises a bamboo
veneer surface layer, and glue-dipped paper
layers and
kraft paper which are sequentially and repeatedly arranged, or
glass fiber net
layers, glue-dipped paper
layers and bamboo
veneer layers which are sequentially and repeatedly arranged, wherein all the layers are pressed and connected together through high temperature and
high pressure, large-molecular-weight glue is adopted for the first glue-dipped paper layer under the bamboo
veneer surface layer, and small-molecular-weight glue is adopted for the rest of the glue-dipped paper layers. The production method of the composite board includes the following steps of firstly, conducting high-temperature desugaring and
degreasing on the bamboo veneer layers except the bamboo veneer
surface layer; secondly, attaching non-
woven fabric or a
glass fiber net to the back face of the bamboo veneer surface layer; thirdly,
drying and balancing all the bamboo veneer layers processed in the first step and the second step; fourthly, absorbing
fire retardant from the dried and balanced bamboo veneer layers through the negative pressure mode; fifthly, sequentially, repeatedly and flat laying the bamboo veneer surface layer, the glue-dipped paper layers and the
kraft paper or laying the
glass fiber net layers, the glue-dipped paper layers and the bamboo veneer layers on a pressing
machine layer by layer, and closely pressing all the bamboo veneer layers and the kraft layers or pressing the glass
fiber net layers and the glue-dipped paper together through pressure of the pressing
machine. By means of the technical scheme, the composite board has effects of water prevention, fire retardance and high strength.