The invention relates to a method for simply and quickly separating cercospora monospores. A specially-made spore taking device is adopted, one end of the spore taking device is made into a flat round spore taking ball, and the other end of the spore taking device is made into a spore taking shovel which is slightly sharp at the front end and is in a flat shovel shape. The spore taking device can glue pathogen spores of a small amount, a culture medium is evenly coated with the pathogen spores, it can be guaranteed that one spore arises in a view of 10*10 times, the spore density is low, a target spore is easy to find, blade residual bodies do not adhere easily, the pathogen spores can be separated easily, and the separation rate and separation speed are improved effectively. The chosen spore is a spore which is cultured for 24 h and is germinated, the result that germination cannot occur after single spores are chosen in other methods is effectively avoided, and the success rate is high. The spore is chosen in a mode of spore taking through adhesion, the operation is quick, the success rate is high, the picking efficiency is improved, the operation technique difficulty of the method is not high, the method can be mastered skillfully after several trainings, and the method is easy to handle, simple and easy to learn.