The invention relates to a clam extract enteric-coated capsule and a production method thereof. The clam extract enteric-coated capsule comprises a clam extract freeze-dried powder and an accessory, the weight of the accessory is 3 percent to 5 percent of the clam extract freeze-dried powder, wherein, the accessory is silicon dioxide and magnesium stearate, the weight ratio of which is 1:1 to 2:1. The clam extract freeze-dried powder is obtained by the steps of cleaning marine organism clams, removing shells, taking out soft bodies, mashing, extracting and freeze-drying. The clam extract enteric-coated capsule is rich in resources and easy to product, has high biological activity, can significantly improve the symptoms of malignancy, decreases myoma volume, enhances the quality of life, prolongs life cycle and can be applied to treating malignancy patients, such as lung cancer, liver cancer, renal carcinoma, carcinoma ventriculi, cervical carcinoma patients and the like and no obvious toxic and side effect is found.