Four different test samples (no deflector, deflector with one hole, deflector with five holes, and deflector with twelve holes in the manifold) of micro-channel evaporator with parallel flow were processed. Flow distribution characteristics of deflectors were experimentally studied with water as the working fluid. The results showed that when the entrance Reynolds number was less than 3000, the influence of which on the flow distribution characteristics of both the samples without deflector and with the deflector with one hole was apparent, and the flow distribution uniformity and stability of the two test samples were poor, but the sample without deflector was better than the deflector with one hole. After the entrance Reynolds number was more than 3000, the uniformity and stability of the deflector with one hole was becoming better, but the uniformity of the sample without deflector was the worst in four of the test samples. The deflector with five holes had the good and stable flow distribution uniformity when the Reynolds number was less than 4000. As the Reynolds number was more than 4000, the flow distribution uniformity was worse. In comparison, the flow distribution uniformity and stability of the deflector with twelve holes were always the best in all the test samples, and as the entrance Reynolds number increased, the uniformity of flow distribution was improved slightly. 