NOVELTY - A C4 material selective hydrogenation method involves mixing selective hydrogenation catalyst C4 stream with a recycling material. The mixture is made to enter into a bed hydrogenation reactor (I). The mixture is reacted in the presence of catalyst to remove butadiene and acetylene and generate butane by hydrogenation reaction. The mixture is made to pass through a gas-liquid separating device (III) for separating gas and liquid. Portion of the liquid is sent to a circulating pump inlet of the reactor, and mixed with the C4 stream. The liquid and hydrogen are sent to a terminal reactor (II).    USE - Method for performing selective hydrogenation for C4 material containing high butadiene content.    ADVANTAGE - The method enables reducing the butadiene and the acetylene content of the hydrogenated C4 stream below 10 ppm, improving selectivity of the butadiene for about 50% and utilizing the C4 material reasonably.    DETAILED DESCRIPTION - A C4 material selective hydrogenation method involves mixing selective hydrogenation catalyst C4 stream with a recycling material, where C4 stream contains 1, 3 and 1, 2-butadiene, acetylene ethyl and vinyl acetylene. The mixture is made to enter into a serially connected bed hydrogenation reactor (I), where the reactor is provided with a cooler and filled with hydrogen, the reactor is operated at pressure of 0.6-4 Mpa, inlet temperature of the reactor is 30-80 degrees C and volume space velocity of the mixture is 10-100hours -1. The mixture is reacted in the presence of catalyst to remove butadiene and acetylene and generate butene by selective hydrogenation reaction. The mixture is made to pass through a gas-liquid separating device (III) after heat exchange for separating gas and liquid. Portion of the liquid is sent to a circulating pump inlet of the reactor, and mixed with the C4 stream in ratio of 5:1-100:1. The liquid and hydrogen are sent to a terminal reactor (II), where the reactors contains same or different hydrogenation catalysts, the terminal reactor is operated at pressure of 0.6-4 Mpa, inlet temperature of the terminal reactor is 30-80 degrees C and volume space velocity of the mixture is 0.2-50hours-1.    DESCRIPTION OF DRAWING(S) - The drawing shows a flow diagram illustrating a method for performing selective hydrogenation for C4 material containing high butadiene content.    Bed hydrogenation reactor (I)    Terminal reactor (II)    Gas-liquid separating device (III)