The invention discloses a portable connection type bicycle. A plurality of bicycle units are connected to form a bicycle allowing many people to ride, each bicycle unit comprises a main shaft, a T-shaped shaft connecting hole is formed in the rear end of the main shaft, and a universal joint is arranged at the connecting position of the T-shaped shaft connecting hole and aonther bicycle unit; a bicycle body quick-disassembling part is arranged at the T-shaped shaft connecting hole, and a front connecting hole is formed in the front end of the main shaft; the two adjacent bicycle units are connected through the T-shaped shaft connecting hole, the front connecting hole, the universal joint and the bicycle body quick-disassembling part. A structural manner that the T-shaped shaft connecting holes are formed in the main shafts of the bicycle units is adopted, so that the bicycle units can be connected continuously, the number of people riding the bicycle can be further changed, and users can quickly disassemble the excess bicycle units when the excess bicycle units are not used, the operation of the users is convenient, and the riding experience of the users is improved.