The curent experimental research on the viscosity coellicient of liquids mainly focuses on theimprovement of measurement methods and equipment, but there is relatively little research on experimentalconditions such as infinite depth and wide range of liquids and the requirement for uniform motion of smallballs in the motion range Based on this, the improved laser mesh method liquid viscosity coeficientexperimental device was used to study the experimental conditions, and the basis for selecting the uniformmotion range required in the experimental conditions and the influence relationship of non infinite depth andwidth on the liquid viseosity coellicient were obtained By studying the experimental conditions of liquidviscosity coelficient, not only has the rigor of the experiment been improved and the experimental content beenenriched, but also the experimental horizon of students has been expanded, electively cultivating theirinnovative thinking and ability.