Bicycle frame system with internal transmission embedded in five-way part of bicycle

The invention discloses a bicycle frame system with an internal transmission embedded in a five-way part of a bicycle. The bicycle frame system comprises a vertical pipe, a five-way part, a head pipe, a lower pipe, an upper pipe, a bottom fork and a vertical fork, and is characterized in that an installation box is arranged at the five-way part of a bicycle frame, the inner transmission is installed in the installation box, an inner transmission finger shifting device is arranged on a handlebar, a junction box is embedded in a lower pipe of the frame, an inner transmission finger shifting device pull wire and a gear shifting pull wire pass through the lower pipe and are connected in the junction box, and a rear brake and a rear speed changing pull wire from a handlebar to a rear wheel enter from the upper end of the lower pipe, enter the bottom fork through a channel in the installation box and are led out from the rear end of the bottom fork. The frame system is obviously superior to an original inner transm