In view of air leakage problem of the sintering machine, the causes of air leakage were analyzed, and the corresponding air leakage parts were found, and based on this, the integrated low leakage sealing technologies developed by Zhongye Changtian were introduced, including the negative pressure adsorption end sealing technology, the new type slide sealing technology, the pallet sealing technology of sinter machine and the pneumatic double-act dust dump valve technology etc. The method of detecting the air leakage rate of the sintering machine in combination with the static load test of the sintering machine pallet and the dynamic test of the rated load of the sintering machine pallet was used to test the air leakage rate of the Zhanjiang sinter machine, and the air leakage rate of the sinter machine was 17.59%. Compared with the conventional sinter machine, the air leakage rate of sintering machine has dropped by nearly 50%, which is in line with the national industrial policy of energy conservation, emission reduction and cost reduction.