mechanized irrigation device for seedlings. wherein the device (1a) itself is composed of a cylindrical chamber (10) pivotally coupled to an axis (11) where the end of a hydraulic cylindrical (12) whose opposite end is also pivotable in struts (13) fixed to the structure. the arm (4); The invention further contemplates a water applicator mechanism (a) wherein the cylindrical chamber (10) is internally provided with an "hollow" cone-like cone (23). a vertical tower (6) houses the valve (21) actuated by the hydraulic cylinder (8) connected to the solenoid valve (9), where hoses (9a) and (9b) are connected to the tractor's hydraulic control or similar; the device (a) itself is composed of a cylindrical chamber (10) pivotably coupled to an axis (11) where the end of a hydraulic cylinder (12) acts, the opposite end of which is also pivotable in bores (13) fixed to the housing structure. arm (4); The invention further contemplates a water applicator mechanism (a) in which the cylindrical chamber (10) is internally provided with a non-hollow cone (23), "Chinese hat" type, structural tubes (22) and a central water outlet tube. (14), the latter projecting out of the chamber (10) and securing to said axis (11), where coupled, as said, the hydraulic cylinder (12), ie fixed on one side to the tube water outlet (14) and, on the opposite side, waiting (13); The invention also stands out for having the oil and water systems activated simultaneously by the operator or automatically.dispositivo de irrigação mecanizada para mudas. no qual o dispositivo (1a) propriamente é composto de uma câmara cilíndrica (10) acoplada pivotavelmente em um eixo (11) onde atua a extremidade de um cilíndrico hidráulico (12) cuja extremidade oposta é também pivotável em esperas (13) fixas na estrutura do braço (4); a invenção contempla ainda um mecanismo aplicador de água (a) onde a câmara cilíndrica (10) é dotada internamente de um cone não vazado (23), tipo "chapéu chinês". uma torre vertical (6) aloj