Non-contact body fluid cavity division metering drainage bag

The utility model relates to the technical field of drainage bags, and provides a non-contact body fluid cavity dividing metering drainage bag which comprises a drainage bag body, a drainage box is arranged on the side wall of the drainage bag body, a partition plate is arranged in the drainage box, a sealing plate is arranged on one side of the partition plate, and a drainage piece is arranged on the side, away from the partition plate, of the sealing plate. The drainage piece comprises a floating plate and an elastic piece arranged on one side of the floating plate. The drainage bag body and the drainage box are matched with each other, the liquid storage space is increased, the drainage piece is arranged in the drainage box, so that the floating plate can float after the liquid in the drainage box reaches a certain amount, the floating plate extrudes the elastic piece, and the liquid can flow into the drainage bag body; therefore, the situation that medical workers need to observe frequently is reduced, mo