The horizontal non shrink automatic tube expander is a special expansion equipment for producing high-quality finned heat exchanger. It completes the process of automatic tube arrangement, tube expansion, flaring and flanging in one working cycle. The equipment automatically selects fins and automatically inserts fins through servo motor and suction cup, transmits pressure to expansion rod and expansion ball through servo motor, and expands the copper pipe, so that all fins of the copper pipe are closely bonded together, so as to better play the role of heat exchanger. The control system adopts programmable logic controller for centralized control and friendly man-machine interface operation mode. The expansion mechanism is controlled by AC servo system, which has high degree of automation, fast speed, convenient operation, stable operation, high precision and reliable performance. The most important thing is to save energy