The utility model relates to a guide-type injection device for coiled tubing, which consists of twelve pairs of pressing wheels and driving wheels, transmission gear sets, a pressing cylinder, a hydraulic motor and a double-sided board. The twelve pairs of pressing wheels and driving wheels are combined and arranged in a circular arc form correspondingly, the pressing wheels are arranged on an outer circle, the driving wheels are arranged on an inner circle, the transmission gear sets are parallelly arranged on the inner sides of the driving wheels, each transmission gear matches with two driving wheels adjacent to the transmission gear, the transmission gears drive the pressing wheels and the driving wheels in operation, the pressing cylinder and the hydraulic motor are arranged on the side with the pressing wheels, the hydraulic motor is connected with the pressing cylinder and provides power to the pressing cylinder, the pressing cylinder provides power for pressing and expanding a pulley set, and the pressing wheels, the pressing cylinder and the hydraulic motor are fixedly assembled on the double-sided board. The guide-type injection device for coiled tubing is compact in structure, has a guiding function, and can be abutted to various wellheads, so that operating process can be simplified. In addition, a pipeline is uniform in stress and difficult to damage by adopting metal roller transmission for underground injection for coiled tubing.