Hollow rice flour die

A hollow rice flour die is formed by an upper die plate, a flat die plate and a concave die plate. A hollow groove is arranged in the middle portion of the upper die plate; a square frame is arranged in the middle portion of the concave die plate; the size of the hollow groove and the size of the square frame match with the size of the flat die plate; the flat die plate is placed between the upper die plate and the concave die plate in clamping manner; pluralities of rows of feeding grooves I are arranged on the flat die plate; a row of steel needles is fixed between two feeding grooves I; cylindrical holes corresponding to the steel needles and feeding grooves II corresponding to the feeding grooves I are arranged on the concave die plate; the steel needles are inserted into the cylindrical holes to form cylindrical space when the flat die plate coincidences with the concave die plate; a horn opening is arranged at one end of each cylindrical hole close to the coincident surface of the concave die plate and