Abstract: Combined with foreign advanced “continuous sand filter" technology, the traditional filter equipment was innovated, exchanging the filtration course with “upward flow filtration" and adopting “washing sand gas-lift" as filter material cleaning technique. In the reconstructed technique, called “continuous sand filter", the filtration tower construct would be easier and maintenance be more convenient compared with the traditional ones. The running efficiency would increase by 50% with high stabilization, and the cost would decrease by 50%. The equipment-reconstructing technology of “continuous sand filter" is suitable for the exiting industry status in China, as it makes good use of the exiting equipment, gets the technology innovation through least investment and makes the process simple. It is very suitable for small-scale reclaimed water reuse systems.