The invention relates to a preparation method of a MTN zeolite-form novel composite material for enrichment and catalytic degradation of organic matters. The preparation method comprises preparing a MIL-100 porous adsorbing material through a room temperature stirring method, adding butyl titanate into the reaction solution and carrying out stirring for some hours to obtain the TiO2-MIL-100 composite material for enrichment and catalytic degradation of organic matters. The preparation method has simple processes and is easy to operate. Adsorption and degradation experiments prove that the prepared composite material has a regular structure, a large pore volume and good organic matter degradation effects. According to the preparation method, a use ratio of TiO2 and MIL-100 is not limited. According to the needs of the research or the actual application, any ratio can be used in the coating.