Adsorption of organic vapors by palygorskite and sepiolite was studied with IR spectrometry, XRD analysis and electrophoresis in this article. It was proved that the adsorption is produced by the static electric force .The adsorbed water on the surface of the minerals which can weaken the static electric force will hinder palygorskite and sepiolite from adsorbing organic vapors, and after drying at 110℃, the absorbed vapors increase obviously.The absorptive capacity is related to the temperature and pressure of vapors, dipole moments of vapor molecules, purity of the samples and crystallinily of the minerals. The adsorbed vapors will be reduced if the temperature rises because the strengthened molecular movement of vapors makes it more difficult for palygorskite and sepiolite to adsorb vapor molecules. If the dipole moment of vapors is enhanced the amount of adsorbed vapors will increase accordingly.Increasing vapor pressure can increase the frequency of collision between vapor molecules and minerals and then increase the adsorptive capacity. The increase of the rate of substitution of the ion Si4+by other ions will intensify the static force and will also increase the adsorptive ca- pacity of organic vapors. The purity of samples can affect the adsorbed amount too, i.e. the purer the samples, the larger the adsorbed amount. The organic molecules were proved to be physically absorbed on the surface of palygorskite and sepiolite through experiments. It is very easy to desorb.