The present invention relates to the methods for producing the milk with high natural vitamin D3 contents, it includes remaining to irradiate one or bull lactating mammal with the photophore that at least one includes the lamp of transmitting UV-A- rays and UV-B- rays in room cleithral, and milk to the animal. The milk with high-content natural vitamin D can be produced by the method. The method also results in the output of milk of every animal improvement.
