The invention provides a carding machine. The problems are effectively solved that for a traditional carding machine, the angle and cutter feeding quantity of a dust removal device cannot be adjusted,and dust removal equipment is complex, large in size and high in energy consumption. According to the technical scheme, the carding machine comprises a slab, a collection groove is formed in the slab, and a blade is arranged on the slab; a sliding block is arranged in the collection groove, a threaded rod is arranged in the collection groove, a first discharging port and a second discharging portare formed in the collection groove, and cotton collection devices are arranged at the first discharging port and the second discharging port; a rectangular box is arranged below the slab, a first partition plate is arranged in the rectangular box and divides the rectangular box into an upper cavity and a lower cavity, and a push plate is arranged in the upper cavity; air inlets are formed in a front cavity and a rear cavity, and the lower cavity is provided with an air outlet; a push-pull rod is arranged on the push plate, and spray nozzles are arranged above the slab. The carding machine isingenious in structure, the angle and cutter feeding quantity of a dust removal cuter can be adjusted, the dust removal mode and the mode of collecting waste materials are ingenious, flock is prevented from diffusing into a workshop as mush as possible, the cost is effectively lowered, the energy consumption of equipment is greatly lowered, and the carding machine is easy to implement and convenient to popularize.