Compound feed for laying hens as well as preparation method and equipment of compound feed

The invention belongs to the technical field of poultry feed, and particularly relates to compound feed for laying hens as well as a preparation method and equipment of the compound feed. According to the laying hen feed, the immunity of laying hens can be remarkably improved in a manner of newly adding the Chinese herbal medicine additive in a powder specification. In addition, the invention further provides a laying hen feed preparation method using the rolling type air heater, the rolling type air heater structurally comprises a base unit, a transverse rotating barrel body unit, a circular slotting plate unit and a hot air pipe unit, and the rolling type air heater has the advantages of being high in heating and drying efficiency of traditional Chinese medicine materials and convenient to operate. The Chinese herbal medicine additive has the following advantages: firstly, after the traditional Chinese herbal medicine additive is added into the conventional common laying hen feed, the disease prevention and