Precision casting coating viscosity on-line measuring device

The invention discloses a precision casting coating viscosity on-line measuring device which comprises a support, a measuring device is arranged in the middle of the support, and the measuring device comprises a supporting suspension connected with the support; a lifting air cylinder is fixedly arranged at the upper end of the support, the lower end of the lifting air cylinder is fixed to the supporting suspension, and a liquid bearing device is connected to the lower portion of the lifting air cylinder. The side surface of the bracket is provided with a rotary slurry dipping barrel positioned below the liquid bearing device; the liquid bearing device comprises a liquid bearing funnel, the liquid bearing funnel comprises a conical part located on the lower portion of the liquid bearing funnel, a liquid inlet is formed in the side wall of the conical part, a liquid outlet is formed in the lower portion of the conical part, the liquid bearing device further comprises a liquid bearing funnel cover plate connecte