Wastewater treatment device capable of detecting water quality on line

The invention discloses a wastewater treatment device capable of detecting water quality on line. The wastewater treatment device comprises a shell as well as a sealing head and a sleeve respectively connected to two ends of the shell; the inside of the sleeve is horizontally sleeved with a water pipe joint; the end, far away from the sleeve, of the water pipe joint is connected with a water inlet pipe by a hose; the bottom of the water pipe joint is fixedly connected with a connecting frame; the bottom of the connecting frame is slidably connected to the upper part of a bottom frame; a mounting groove is formed inside the bottom frame; a first hydraulic column is horizontally mounted inside the mounting groove; and one end of the first hydraulic column is connected with one side of the bottom of the connecting frame. Coarse filter screens can be freely rotated and replaced, and different types of coarse filter screens can be used for different water quality conditions, so that the wastewater filtering effici