Device and method for measuring viscosity coefficient of viscous liquid

The invention discloses a measuring device and a measuring method for the viscosity coefficient of viscous liquid. The measuring device comprises a cylinder part (1), a bottom plate (2), a needle head (3), a hose (4) and an injector (5), the upper end of the cylinder part (1) is open, the lower end of the cylinder part (1) is fixedly connected with the upper surface of the bottom plate (2), and the lower end of the cylinder part (1) is in airtight connection with the bottom plate (2), so that the cylinder part (1) and the bottom plate (2) form a container capable of containing viscous liquid; the needle head (3) is fixedly arranged on the bottom plate (2) and is in airtight connection with the bottom plate (2), the front end of the needle head (3) penetrates through the bottom plate (2) and extends into the inner cavity of the cylinder part (1), and the rear end of the needle head (3) is located on the outer side of the lower surface of the bottom plate (2); one end of the hose (4) is in airtight connection w