A assembly-and-disassembly structure for a toilet cover, comprising: a cover plate assembly, two support bases, and two rotation shafts (2.07) connected to the cover plate assembly and the two support bases, a locking rod (2.08, 2.14) and a locking rod resetting device are disposed in each of the two rotation shafts (2.07), an outer end of a first locking rod (2.08) comprises a locking plate (2.14-5), each of the two support bases comprises an abutting block (2.01), the abutting blocks (2.01) comprise sliding portions configured to respectively abut the first locking rod (2.08) and a second locking rod (2.14) to drive the first locking rod (2.08) and the second locking rod (2.14) to move laterally, characterized in that a torsion spring is disposed between the first locking rod (2.08) and the second locking rod (2.14), a first end of the torsion spring (2.13) is movably connected to the first locking rod (2.08), a second end is connected to the second locking rod (2.14), the second locking rod (2.14) comprises a torsion spring fixing portion (2.14-2), an inner end comprises a sliding groove structure configured to receive the first end of the torsion spring (2.13) to move, the sliding groove structure comprises a V-shaped groove (2.08-6) and a strip-shaped groove (2.08-3) connected to said V-shaped groove (2.08-6), when the abutting blocks (2.01) respectively abut the locking rods (2.08, 2.14) to bring the locking rods (2.08, 2.14) close to each other or separate from each other, the first end of the torsion spring (2.13) is configured to move to a bottom of the V-shaped groove (2.08-6) or the strip-shaped groove (2.08-3), and the first locking rod (2.08) and the second locking rod (2.14) separate from or lock to locking grooves of the support bases. a cover plate assembly, two support bases, and two rotation shafts (2.07) connected to the cover plate assembly and the two support bases, a locking rod (2.08, 2.14) and a locking rod resetting device are disposed in each of the two rotation shafts (2.07), an outer end of a first locking rod (2.08) comprises a locking plate (2.14-5), each of the two support bases comprises an abutting block (2.01), the abutting blocks (2.01) comprise sliding portions configured to respectively abut the first locking rod (2.08) and a second locking rod (2.14) to drive the first locking rod (2.08) and the second locking rod (2.14) to move laterally, characterized in that a torsion spring is disposed between the first locking rod (2.08) and the second locking rod (2.14), a first end of the torsion spring (2.13) is movably connected to the first locking rod (2.08), a second end is connected to the second locking rod (2.14), the second locking rod (2.14) comprises a torsion spring fixing portion (2.14-2), an inner end comprises a sliding groove structure configured to receive the first end of the torsion spring (2.13) to move, the sliding groove structure comprises a V-shaped groove (2.08-6) and a strip-shaped groove (2.08-3) connected to said V-shaped groove (2.08-6), when the abutting blocks (2.01) respectively abut the locking rods (2.08, 2.14) to bring the locking rods (2.08, 2.14) close to each other or separate from each other, the first end of the torsion spring (2.13) is configured to move to a bottom of the V-shaped groove (2.08-6) or the strip-shaped groove (2.08-3), and the first locking rod (2.08) and the second locking rod (2.14) separate from or lock to locking grooves of the support bases. a locking rod (2.08, 2.14) and a locking rod resetting device are disposed in each of the two rotation shafts (2.07), an outer end of a first locking rod (2.08) comprises a locking plate (2.14-5), each of the two support bases comprises an abutting block (2.01), the abutting blocks (2.01) comprise sliding portions configured to respectively abut the first locking rod (2.08) and a second locking rod (2.14) to drive the first locking rod (2.08) and the second locking rod (2.14) to move laterally, characterized in that a torsion spring is disposed between the first locking rod (2.08) and the second locking rod (2.14), a first end of the torsion spring (2.13) is movably connected to the first locking rod (2.08), a second end is connected to the second locking rod (2.14), the second locking rod (2.14) comprises a torsion spring fixing portion (2.14-2), an inner end comprises a sliding groove structure configured to receive the first end of the torsion spring (2.13) to move, the sliding groove structure comprises a V-shaped groove (2.08-6) and a strip-shaped groove (2.08-3) connected to said V-shaped groove (2.08-6), when the abutting blocks (2.01) respectively abut the locking rods (2.08, 2.14) to bring the locking rods (2.08, 2.14) close to each other or separate from each other, the first end of the torsion spring (2.13) is configured to move to a bottom of the V-shaped groove (2.08-6) or the strip-shaped groove (2.08-3), and the first locking rod (2.08) and the second locking rod (2.14) separate from or lock to locking grooves of the support bases. the first end of the torsion spring (2.13) is configured to move to a bottom of the V-shaped groove (2.08-6) or the strip-shaped groove (2.08-3), and the first locking rod (2.08) and the second locking rod (2.14) separate from or lock to locking grooves of the support bases.