The coupling of space light to optical fiber is the key problem in fre e space optical communication.The diameter of fiber core is very small,which brings great diff iculties to coupling.In order to improve the coupling efficiency,we analyze the cou pling model of space light to a single fiber,and then put forward a new receiving method whi ch adopts a conical fiber array as receiver.After that,the sample of conical fi ber array is fabricated in the laboratory,and the test experiment in micro-vibration environment is carried out,in which two methods are used to measure the received optical power.In the first method,a l arge target avalanche photodiode (APD) is used to receive the optical power of nine fibers s imultaneously.In the second method,the light in nine fibers is merged into one with the optical splitter,and then the optical power is measured with an optical power meter.The measurement results s how that the optical power measured with the first method is higher,because the energy leaka ge would exist in the merged fiber.On the whole,the results of two receiving metho ds indicate that the sample can meet the desired requirements.