Disclosed are an optical fiber puncture needle capable of uniformly emitting light, and a method for preparing a slit (12) and a light homogenizer (2). The optical fiber puncture needle comprises an optical fiber. The optical fiber comprises a main body portion (8). The main body portion (8) is connected to the light homogenizer (2) capable of uniformly emitting light. The light homogenizer (2) comprises a tube sleeve (11) with an inner wall thereof having a reflection effect. A lateral face of the tube sleeve (11) is provided with the slit (12) running through inner and outer sides of the tube sleeve (11) and being capable of uniformly emitting light. The periphery of the main body portion (8) is wrapped by a main body tube (9). The periphery of the light homogenizer (2) is wrapped by a petal-shaped needle head (3) made of memory metal. The puncture needle can realize, by means of cooperative interaction between various components, the purpose of carrying out transmission in a long blood vessel more quickly, for example, the puncture needle can smoothly pass through a blood vessel with a length of nearly two meters； and the puncture needle can realize higher light emission efficiency and a better therapeutic effect, and has great application value and significance in photodynamic tumor therapy.L'invention concerne une aiguille de ponction à fibre optique capable d'émettre uniformément de la lumière, et une méthode de préparation d'une fente (12) et d'un homogénéisateur de lumière (2). L'aiguille de ponction à fibre optique comprend une fibre optique. La fibre optique comprend une partie de corps principal (8). La partie de corps principal (8) est reliée à l'homogénéisateur de lumière (2) capable d'émettre uniformément de la lumière. L'homogénéisateur de lumière (2) comprend un manchon tubulaire (11) dont une paroi interne a un effet de réflexion. Une face latérale du manchon tubulaire (11) est pourvue de la fente (12) s'étendant à travers les côtés interne et exter
