Double-hole self-clamping type quick disassembly support device for child seat of bicycle

The utility model discloses a double-hole self-clamping type quick disassembly support device for a bicycle child seat, which comprises a support body used for being connected with a frame of a bicycle, a U-shaped bent pipe assembly connected with the bottom of the bicycle child seat, a spring gland, a spring and a double-hole transverse clamping piece which are connected with the fixed end of a mounting groove through the spring gland. The double-hole transverse clamping piece is fixed in the mounting groove, the lock end at the front end of the double-hole transverse clamping piece penetrates through the lock hole of the mounting through hole and is inserted into the bent pipe lock hole of the U-shaped bent pipe assembly, and the U-shaped bent pipe assembly and the support body are mutually and automatically connected and locked under the action of the spring; the double-hole transverse clamping piece is pulled upwards, the lock end is sequentially pulled out of the bent pipe lock hole of the U-shaped bent