A kind of safety arrestment structure of small row-crop machine,Its mainly include a safety handle,One clutch base,One tension wheel arm,One straining pulley,One clutch line,One extension spring,One driving wheel,One power output wheel and a belt,Through the bar thick stick principle for pinning safety handle,Clutch line is enabled to pull tension wheel arm,It supports straining pulley and oppresses belt,And belt is forced to tighten on what driving wheel and power output wheel,Enabling driving wheel can pass through belt drives power output wheel output power to give cultivator,The power that walking or ploughing and weeding swivel as cultivator are moved； And when decontroling safety handle,Set extension spring drives tension wheel arm to reply original position on clutch line,Straining pulley is enabled no longer to oppress belt,So that driving wheel power can not be transferred to power output wheel,Make the walking or ploughing and weeding knife power interruption of cultivator,And the structure of ploughing and weeding knife can be driven by such safety handle that must pin,The accident generated by improper operation small row-crop machine can be reduced.一種小型中耕機之安全制動結構，其主要包括一安全把手、一離合器座、一張力輪臂、一張力輪、一離合器線、一拉伸彈簧、一主動輪、一動力輸出輪及一皮帶，透過按住安全把手之桿槓原理，令離合器線拉動張力輪臂，使張力輪抵頂並壓迫皮帶，並迫使皮帶緊縮於主動輪與動力輸出輪上，令主動輪可透過皮帶驅使動力輸出輪輸出動力予中耕機，作為中耕機之行走或耕耘刀轉動之動力；而當放開安全把手時，離合器線上所設之拉伸彈簧帶動張力輪臂回復原先位置，令張力輪不再壓迫皮帶，使主動輪無法將動力傳遞至動力輸出輪，使中耕機之行走或耕耘刀動力中斷，而藉由此種必須按住安全把手方可驅使耕耘刀之結構，可降低因不當操作小型中耕機而產生的意外。
