An automatic fluid discharge and drainage device relates to the field of medical instruments and comprises a control chamber (1) connected to a drainage container. A drainage container connecting pipe (11) is disposed at the top of the control chamber (1). A fluid discharge outlet (12) is disposed at the bottom of the control chamber (1). The control chamber (1) is separated into an upper fluid storage cavity and a lower fluid discharge channel by means of a partition (13) that is disposed at the center of the control chamber (1) and provided with a fluid drainage outlet (14). A control device that automatically opens the fluid drainage outlet (14) after fluid in the upper fluid storage cavity is excessive is disposed in the control chamber (1). The device introduces drainage fluid into the upper fluid storage cavity by using the drainage container connecting pipe when the fluid in the upper fluid storage cavity is excessive, the control device can be triggered to act, and the fluid drainage outlet (14) is opened to discharge the fluid after the fluid is discharged completely, the control device recovers its original state, and the fluid drainage outlet is sealed and therefore, the workload of nursing personnel is reduced.Linvention porte sur un dispositif dévacuation et drainage automatiques et appartient au domaine des instruments médicaux. Ce dispositif comprend une chambre de commande (1) en communication avec un réservoir de drainage, la partie supérieure de la chambre de commande (1) présentant un tube de liaison (11) avec le réservoir de drainage et la partie inférieure de la chambre de commande (1) permettant, moyennant un séparateur (13) logé dans un orifice dévacuation (14), de diviser la chambre en deux, à savoir en haut un réservoir de liquide et en bas un tube dévacuation. La chambre de commande (1) permet douvrir lorifice dévacuation du dispositif de commande lorsque la chambre réservoir contient trop de liquide. Le liquide drainé sécoule vers la parti
