The subject innovation relates before compression stationary drainage for the sink, and more particularly, to form the upper end of the drain tube in an inclined slope by a predetermined distance outward in order to secure the drainage tube to the bucket bottom end of the sink, the inclined surface on the outside by extrapolation of the fastener in a ring shape to surround the drainage tube according to the pressure, in the conventional drainage tube by providing a configuration such that the fixture is as riding the slopes moves toward the image side compression secure the drainage tube and pushing it down to the lower end of the bucket of the sink the retaining tab unlike before Screwed drainage by sikideon fixing the drainage cylinder combined with simplified configuration and manufacturing process of the product increases the other hand productivity cost savings, comprised the installation before draining easier, being in contact with wastewater or food waste becomes drained through the easy to clean is integrated seamlessly inside Substitute greater compression related fixed before draining. According to the present invention, when a multiple lake connection and the overflow lake connection and formed on the side surface, a sink pass through drain the flange across the lower end portion formed at the top of the bucket, the drain tube prior to the sink drain for consisting of the fastener to secure the bottom bucket in the drainage tube being inclined slope formed from a predetermined length to the flange lower part to the outside direction, the fixture is extrapolated to one end is it is in a ring shape that the bolt is inserted into the opening portion end formed cutting, the drainage tube slopes sink transition squeezed stationary drainage for that as the fastener is being pinched by a bolt pressed into the lower end of the lower surface crimp bucket fixing the drainage tube to the lower end of the upper surface is provided in close contact with the bucket.