The invention belongs to the technical field of Chilades pandava prevention in a leaf development period of Cycas revolute and particularly relates to a Chilades pandava biological-physical prevention method applied to the leaf development period of Cycas revolute. According to the Chilades pandava biological-physical prevention method, young leaves of Cycas revolute are covered with a light transmitting and ventilating shield in the preliminary stage of leaf development of Chilades pandava, so that the young leaves are isolated from Chilades pandava adults, and the Chilades pandava adults are prevented from laying eggs on the young leaves of Cycas revolute. The Chilades pandava biological-physical prevention method is completely different from a traditional Cycas revolute insect prevention method, no or few chemicals are sprayed, and therefore, the purpose of preventing the Chilades pandava from gnawing the young leaves of Cycas revolute in the leaf development period is achieved, and integrity and ornamental value of the young leaves of Cycas revolute are ensured easily. By means of the Chilades pandava biological-physical prevention method, workload is small, pollution to the environment is avoided, species are not affected, and eco-environment protection is facilitated.