The invention relates to a needle fixing device of a needle selector. The needle fixing device comprises a needle, a needle clamp and a connecting end (6) fixed to a driving sheet, wherein the needle is composed of a needle head (1) and a needle rod (2); the needle clamp is composed of a middle plate (4) and an external cover plate (5); a clamp head (3) convenient for the insertion of the needle is arranged on the middle plate (4); the tail of the needle rod (2) is a reed (7) capable of generating elastic displacement, and the width of the reed is smaller than that of the needle rod, thereby leaving the space for the elastic displacement; a reed gap (9) and a clamping gap (8) are formed on the reed (7); a bulge (10) for limiting the needle position is formed in the clamp head (3) on the middle plate (4); and the clamping gap (8) is used for pressing the bulge (10) into the gap under the prestress action, thus the needle is fixed in the clamp head (3). The needle fixing device of the needle selector has the advantages of convenience in assembly, disassembly and replacement, high positioning precision and multiple insertion and pulling numbers, and the middle plate is easier to process and manufacture.