Handheld fish tank sewage disposal device with anti-blocking function

The invention relates to the related field of building decoration, and discloses a handheld fish tank sewage disposal device with an anti-blocking function. The handheld fish tank sewage disposal device comprises a main tank body, a transmission gear cavity is formed in the main tank body, a motor bevel gear cavity is formed in the upper side of the transmission gear cavity, a motor straight gearshaft is arranged at the right side of the motor bevel gear cavity, and a left reversing shaft cavity is formed in the left side of the motor straight gear shaft in a communicating manner. According to the handheld fish tank sewage disposal device, the surface of the inner wall of a fish tank is brushed through rotation of a left sweeping brush and a right sweeping brush, so that the purpose of automatically cleaning the fish tank is achieved; then cleaned dirt is sucked by a vane pump from a right water inlet cavity and filtered through a filter screen, clean water flows into the fish tank again, and in this way, cle