Purification method of avian leukosis

The invention relates to a purification method of avian leukosis. The method comprises the following steps that 1, a biological safe system is built; 2, delicacy management in the production process is conducted; 3, the purification procedure of the avian leukosis is conducted. Through long-time experiment, purification of the avian leukosis is conducted by using the purification method, the positive rate of the avian leukosis of all-strain avians is smaller than 1%, the Tiejiaoma strain reaches the negative, and the effect is remarkable; compared with the three purification steps of reduction, control and eradication of the avian leukosis in the prior art, eradication of the avian leukosis is regarded as a target of the purification method of the avian leukosis at the very start, all procedures and measures are conducted according to strictest standards, double results are achieved with half effort, and the purification method is worthy of application and popularization. 本发明涉及种禽白血病的净化方法，具体为以下步骤:(1)生物安全体系的建立；