A filter screen cleaning module , comprising: a cleaning box , having a cleaning cavity , a shaft hole being provided in a box wall of the cleaning box; a screen brush assembly , rollably connected between two opposite box walls of the cleaning box, configured to remove impurities on a filter screen , and having at least one end surface provided with an end hole ; a screen brush drive gear , located outside the cleaning box to be connected with a power source, and coaxially provided with a screen brush connecting shaft , the screen brush connecting shaft passing through the shaft hole into the end hole and configured to rotate synchronously with the screen brush assembly; characterised in that : the cleaning box is provided with a water inlet and a water outlet which are in communication with the cleaning cavity ; and the screen brush assembly comprises a screen brush body and a screen brush inner shaft , comprising: an inner shaft lower cover formed in an elongated shape; and an inner shaft upper cover , formed in an elongated shape, which cooperates with an end of the inner shaft lower cover to form the end hole, a screen brush connecting shaft passing through the inner shaft lower cover and being connected with the inner shaft upper cover. a cleaning box , having a cleaning cavity , a shaft hole being provided in a box wall of the cleaning box; a screen brush assembly , rollably connected between two opposite box walls of the cleaning box, configured to remove impurities on a filter screen , and having at least one end surface provided with an end hole ; a screen brush drive gear , located outside the cleaning box to be connected with a power source, and coaxially provided with a screen brush connecting shaft , the screen brush connecting shaft passing through the shaft hole into the end hole and configured to rotate synchronously with the screen brush assembly; characterised in that : the cleaning box is provided with a water inlet and a water outlet which are in communication with the cleaning cavity ; and the screen brush assembly comprises a screen brush body and a screen brush inner shaft , comprising: an inner shaft lower cover formed in an elongated shape; and an inner shaft upper cover , formed in an elongated shape, which cooperates with an end of the inner shaft lower cover to form the end hole, a screen brush connecting shaft passing through the inner shaft lower cover and being connected with the inner shaft upper cover. the cleaning box is provided with a water inlet and a water outlet which are in communication with the cleaning cavity ; and the screen brush assembly comprises a screen brush body and a screen brush inner shaft , comprising: an inner shaft lower cover formed in an elongated shape; and an inner shaft upper cover , formed in an elongated shape, which cooperates with an end of the inner shaft lower cover to form the end hole, a screen brush connecting shaft passing through the inner shaft lower cover and being connected with the inner shaft upper cover. an inner shaft lower cover formed in an elongated shape; and an inner shaft upper cover , formed in an elongated shape, which cooperates with an end of the inner shaft lower cover to form the end hole, a screen brush connecting shaft passing through the inner shaft lower cover and being connected with the inner shaft upper cover. <EOS>