Blood seepage prevention device for hemodialysis nursing

The blood seepage prevention device comprises a bottom box, the upper end of the bottom box is connected with a base plate in a sliding mode, a lifting mechanism is arranged at the lower end of the base plate, a placing block is fixedly installed at the upper end of the base plate, and a second limiting block is fixedly installed on the rear side of the upper end of the base plate. The rear end of the placing block is fixedly connected with the second limiting block, the upper end of the placing block is slidably connected with a first limiting block, and an adjusting mechanism is arranged on the right side of the first limiting block. By adopting the structure, the rotating block is utilized to rotate the first screw rod to rotate in the bottom box, so that the two moving seats with opposite threads on the outer side of the first screw rod can move in the same direction or different directions, the moving seats are rotationally connected with the supporting arm, and meanwhile, the supporting arm and the lowe