The invention relates to an improved blade structure of a lawn mower.The utility model relates to an improved design of blade structure, which provides safe mowing use and convenient sharp trimming of blade edge.The main body is a fixed knife plate.The plastic blades are pivoted on both sides.Grinding the opposite cutting edge on both sides of the blade.Through plastic materials and pivot assembly,When the blade cuts hard objects during mowing,Adjust the cutting angle naturally.To avoid danger,After the blade is worn,Through the preset equal interlaced crease line on the blade,It is easy to cut and trim the edge of the cutting blade with a cutter.To maintain the sharp need for mowing,To achieve the safe and practical purpose of mowing operation.本創作一種割草機之刀片結構改良，係一種提供割草安全使用又方便刀片刀口銳利修整使用的刀片結構改良設計，主要以一固定刀板為鎖裝主體，兩側樞接延伸的塑性刀片，配合於刀片兩側分別磨削相對的刀口邊，通過塑性材質及樞接組裝，割草時刀片切割到較硬的物件時，會自然轉動調整切割角度，避免產生危險，而在刀片磨損後，透過刀片上預設等分交織的摺痕線，以剪具簡便剪切修整刀片切割刀口緣，維持割草的銳利需要，達到割草操作的安全實用目的。
