The invention provides gelator and organogel formed by the same. The gelator is provided with hydrophobic alkane chains which are located at the two ends of a benzene ring respectively and are different in length, and a group structure containing an amido bond is arranged at the other end of the benzene ring. The invention further discloses a preparing method of the gelator and the organogel formed by the same. By means of the gelator, organic solvent including cyclohexane, petroleum ether, glycol and 1,2-dichloroethane or 1,2-dibromoethane is made to be gelated at the low concentration of 0.1-2wt%, the organogel formed after gelation can be reversibly converted between the solution state and the gel state under the external action of heating and cooling, and the organogel has potential application value in preparing a special effect color medium for catalysis, chemical sensing, drug delivery and chiral compound separating and nano materials in specific shapes.