Abstract: After the upgrade of the HLS, the injector was improved to realize the full-energy inject goal, and the beam current reached 300 mA. To meet the requirement of the top-off mode inject, the injection system adopted the local horizontal bump orbit injection system. In the prepare phase, the impact magnet time jitter and the inhomogeneity of the impact magnetic field were measured and analyzed based on the situation of worksite. An efficient way was presented to reduce injection system error rate. The microwave power source and the injection system used the pre-charge mode in the commissioning test, and the storage ring used turn-by-turn feedback to reduce the residual vibration, which gets a good result. In addition, HLS storage ring’s dose distribution was given under the top-off mode, and a solution was also given to reduce dose rate. Above all, the HLS has the basic condition of top-off mode inject.