Preparation method of porous carbon

The invention discloses a preparation method of porous carbon and belongs to the field of preparation of absorbing materials. For solving the problem of lower medium-pore rate in porous carbon, the invention provides a preparation method of the porous carbon with higher medium-pore rate. The preparation method comprises the following steps of: adopting nano hydrotalcite as a template agent, preparing a vinylidene chloride-methyl acrylate copolymer/nano hydrotalcite composite material by suspension polymerization and melting processing, and preparing the porous carbon by high-temperature carbonization and template removal. The porous carbon prepared by adopting the method has the characteristics that the specific surface area is 1000m .g, the medium-pore diameter is 4nm, and the medium-pore rate is 26.5%, so that the application prospect is wide.