The paper shows the possibility of oligomerization of olefinic hydrocarbons fraction C4 on the zeolite catalyst BAK-70 under the exposure of microwave radiation. The change of physical and chemical properties of the catalyst under the influence of microwave radiation is shown. The catalyst is slightly sintered, which affects the yield of reaction products. There is a decrease in the output of oligomerizate, but decreases the content of aromatic hydrocarbons of 68 % and increases the selectivity of the process of 5.5 %. In order to achieve better process parameters for microwave assisted oligomerization, it is necessary to improve the structure and physical properties of the catalyst, so that an efficient, industrially applicable process.