Middle tube and tail lamp integrated device with built-in circuit

The utility model relates to a middle tube and tail lamp integrated device with a built-in circuit. The middle tube and tail lamp integrated device comprises a tail lamp base, a middle tube, a lining and a tail lamp. A groove is formed in the side face of the tail lamp base. The upper end of the middle tube is connected with one end of the tail lamp holder; one end of the lining is connected with the inner wall of the lower end of the middle pipe; the tail lamp is embedded into a groove in the side face of the tail lamp base. The problems that the appearance is cumbersome, the structure is complicated and bloated, most parts are exposed, the durability is reduced, the product integration degree is low, the number of installed spare parts is large, labor hours are consumed, and the cost is high are solved, and the problems that due to the fact that wiring of a bicycle tail lamp is complex, wiring needs to be exposed, is prone to being damaged and even accelerates aging are solved. 本实用新型涉及一种内置线路的中管尾灯一体化装置，包括：尾灯