The invention discloses a high-efficiency 
straw header which comprises a header frame and a header shell installed on the header frame, wherein the header shell comprises a left side plate, a right side plate, two rear side plates and a bottom plate, a 
straw output port is formed between the two rear side plates, a 
straw cutting knife mechanism is arranged at the front end of the bottom plate, the straw 
cutting knife mechanism comprises a fixed knife 
assembly and a movable knife 
assembly, the fixed knife 
assembly comprises fixed knives arranged in parallel, each fixed knife comprises two fixed knife blocks, a fixed knife groove is formed between the fixed knife blocks, one ends of the two fixed knife blocks are connected together through a fixed knife installation block, the fixed knife installation blocks are installed on a fixed knife connection angle plate, and the fixed knife connection angle plate is installed at the front end of the bottom plate. According to the high-efficiency straw header, a reciprocating type 
cutting knife mechanism is adopted, a straw 
auger is provided with symmetrical spiral blades, a stirring and conveying mechanism is arranged in the middle of the straw 
auger, the height of the straw 
auger is adjustable, and the high-efficiency straw header is high in cutting efficiency, conveying efficiency and adaptability.