A connection device for tourism mini trains relates to railway object transportation devices and belongs to the technical field of railway vehicles and machinery. The connection device comprises a tail frame and a traction body which are connected through a tail pin. The connection device is characterized in that a spring plate is respectively installed at two ends of the tail frame, and a spring buffer is installed between the spring plates. The end portion of the traction body is connected with a connection ring through a chain lock pin, the connection ring is connected with a connection frame in sleeve mode, and a circular face is formed on the surface of the connection frame. The connection device has the advantages that the traction body can rotate around a tail pin central shaft when passing through small curve lines due to the design of the circular face of the connection frame of the traction body, simultaneously circular faces 11 of two adjacent traction bodies can rotate stably and relatively, the large relative rotation angle of two adjacent cars is greatly increased, small curve line passing capability is improved, and the cars can safely and stably pass through lines with smallest curve radius. The connection device is suitable for the low speed tourism mini trains.