Sewage filtering and purifying device

A sewage filtering and purifying device comprising:

• at least one purifying module having
• multiple filters connected in series;
• and
• multiple electrolyzing assemblies connected to the multiple filters to allow sewage to flow through and be filtered by the multiple filters and then sequentially flow through the multiple electrolyzing assemblies, and each one of the multiple electrolyzing assemblies having
• a flow pipe;
• two electrodes disposed inside the flow pipe and configured to be polarized for respectively being a cathode and an anode;
• and
• an outlet pipe connected to the flow pipe and configured to make the sewage flow from the flow pipe to said flow pipe of an adjacent one of the multiple electrolyzing assemblies or an exterior of the flow pipe, wherein the at least one purifying module has multiple heating assemblies;
• each one of the multiple heating assemblies is disposed between adjacent two of the multiple electrolyzing assemblies and has:
• a flow tube connected to the outlet pipe of one of the adjacent two of the multiple electrolyzing assemblies,
• at least one heating component inserted into the flow tube, and
• an outlet tube connected to the flow tube and the flow pipe of the other one of adjacent two of the multiple electrolyzing assemblies.