The utility model provides a root ridger is sealed in adjustable kuan long cotton field which characterized in that, the ridger includes: it constitutes to plough quick -witted connector, stand, entablature, bottom end rail, plough, degree of depth adjusting screw and width adjusting screw, plough quick -witted connector with the entablature is connected, the entablature with stand one end, degree of depth adjusting screw one end are connected, the bottom end rail with the stand other end, the degree of depth adjusting screw other end are connected, the plough with the bottom end rail is connected, the width regulation screw rod with the bottom end rail is connected. The utility model discloses an according to actual need can be in field crop inter -ridge 50 -90cm within range work, 10 horsepowers plough a little the machine pull can accomplish the dark soil layer of 10 -20cm down seal the root operation of earthing up, simple structure convenient to use alleviates intensity of labour, improvement labor efficiency conscientiously.