The invention discloses blades of a multi-blade collimator for electronic wire conformation and intensity modulated radiation therapy (IMRT), which are mainly characterized in that: the blade of the electronic multi-blade collimator is made of tungsten with thickness of 1.50 to 2cm so as to block most of electrons and generate relatively less bremsstrahlung; the end face of the blade is an upright end face, an inclined end face of which the inclined plane forms an angle of 3.75 to 60 degrees with a ray center shaft, and an arc-shaped end face with curvature radius of 0.75 to 0.85cm, and dosage penumbrae generated by the three end faces are basically the same; and the width of the blade is 0.8 to 1.2cm, so that radiated field edge dosage is relatively accurate and the accurate input of the subfield dosage is facilitated. Compared with the photon multi-blade collimator which is commonly used at present, the electronic multi-blade collimator has the advantages of simple structure, small occupied space, low cost, and more suitability for the electronic wire conformation and intensity modulated radiation therapy (IMRT) to better treat superficial tumors.