Usually, when the concentration of industrial dust reaches a certain degree (that is, the limit of explosion), it is very easy to cause explosion and fire when the spark or boundary point of electrostatic discharge is encountered. For example, flour dust, chemical dust, explosive dust and so on. In the field of electrostatic discharge, there is a possibility of explosion. In the field of bag type dust removal, such as these dust needs to be collected with cloth bags, the cloth bag itself has the function of anti static. In addition to producing ordinary needling felt, the production of antistatic filter is also required to be incorporated into the conductive fiber yarn in the base cloth warp of the needled felt.