The present invention discloses a kind of degradable implanted medicine release-controlling carrier system with micropores and cavities, and realizes long term linear release of medicine by means of the combined permeating diffusion and degrading diffusion. The carrier structure is prepared with degradable material lactic acid-glycolic acid polymer, which may be absorbed by human body under the action of body fluid and biological enzyme and has no need of being taking out, reducing patient's pain. The medicine releasing system is suitable for water soluble medicine mainly and has its microporesize, number and distribution designed reasonably based on the molecular weight of the medicine and the required release rate and period and the material parameters regulated. The degradable implanted medicine release-controlling carrier system has great medicine carrying amount, good regulating property and long term constant medicine release.