A kind of improved structure for knife of rice cutting machine,Pre-position on front side of the cutter system installing what rice cutting machine,System includes on majority,Bottom knife,On this,On bottom knife system difference fixed what rice cutting machine in a row,Lower tool apron； It separately is provided with a pressing plate above the cutter,The pressing plate anterolateral system is installed with a sliding block,And one of pressing plate Hou side-line and tool apron Hou side under installing what briquetting group are mutually spliced； Wherein,On each,Bottom knife and it is upper,The riveted holes of interval configuration are all equipped at lower tool apron relative position and at pressing plate and sliding block relative position,Group can be worn and reach fixed person for a riveting parts by using； The feature of this creation tie up to what upper cutter head and each cutter mutually splice at contraposition,Lower tool apron and each bottom knife mutually splice at contraposition,Or the pressing plate mutually splice at contraposition with sliding block at least one be equipped with the positioning combination portion in male and female matching relationship,And it enables between the system, positioning combination portion position what riveted holes； This creation system utilizes the male and female matching relationship in the positioning combination portion,So that group load onto,Can have when bottom knife or sliding block and be pre-positioned effect,Without using both hands help or additionally using jig as position,So that cutter manufacture processing flow it is more convenient,Quickly,And on capable of promoting simultaneously,Stability when bottom knife or sliding block combine,To promote the industries Practical Benefit such as overall structural strength and cutter life.一種割稻機之刀具改良結構，所述刀具係裝設於割稻機前側預定位置處，係包括有多數之上、下刀片，該上、下刀片係分別成排固設於割稻機之上、下刀座；所述上刀片上方另設置有一壓板，該壓板前側係裝設有一滑塊，而壓板後側係與裝設於下刀座後側之一壓塊組相疊接；其中，每一上、下刀片與上、下刀座相對位置處以及壓板與滑塊相對位置處皆設有間隔配置之鉚接孔，藉
