Grain-saving middle and big pork pig mulberry feed and preparation method thereof

A grain-saving middle and big pork pig mulberry feed and a preparation method thereof. The feed includes following raw materials, by weight, 300-450 parts of mulberry total plant being pressed into cake, 550-650 parts of corn flour and 20-50 parts of a pre-blended material, wherein the pre-blended material is composed of following raw materials: manganese sulfate, zinc oxide, copper sulfate, ferrous sulfate, sodium selenite being 1% in mass percentage, iodine salt, stone powder, lysine, phytase and calcium hydrogen phosphate. In the grain-saving middle and big pork pig mulberry feed, the mulberry total plant being pressed into cake is employed for replacing soya bean meal and the like protein feed raw materials as ration, so that the feed cost of breeding the middle and big pork pig is reduced by more than 1 yuan per one kilogram of weight increasing, thereby significantly increasing economic benefit of breeding pigs. The mulberry has the effect of controlling blood glucose and reducing blood fat, so that the content of cholesterol and low-density lipoprotein in port can be reduced by feeding the pork pigs with the mulberry ration for long period. The feed is beneficial to production of green ecological organic pork being high in quality and grade.