Abstract: The performances are directly influenced by the type of micro-sprinkler outlet flow channel. Aiming at the experiment of three improved types of micro-sprinkler flow channel outlets, the quality indices of micro-sprinkler irrigation were analyzed under different pressures. Results showed that the performances were improved for all improved types. The performance of the continuous-horizontal-level type of outlet flow channel type is the best with high stability, and the micro-sprinkler intensity decreasesing by 17.0%～31.2%, the uniformity of water distribution rises to 24.45%～35.04%, the micro-sprinkling pattern radius increases by 22.04%～21.47%.