In order to better understand the causes and the processes of clogging for labyrinth-path emitters, the influences of sediment concentration, sediment particle size distribution and water temperature on emitter clogging were investigated through the intermittent drip irrigation method. The result showed that smaller particles tended to cause emitter be clogged during the irrigation when the particle sized in muddy water were less than 0.1mm, and the degree of clogging increased remarkably as sediment concentrations increased. The degree of emitter clogging was also impacted by water temperature. Emitters were less likely clogged by muddy water with higher temperature. It was found that in the summer when water temperature was relatively high labyrinth-path emitters were prone to clogging by sediment with particle sizes below 0.031mm.