The invention discloses a novel hawthorn fruit pit removing and fruit slicing device and application of the hawthorn fruit pit removing and fruit slicing device, and belongs to the technical field of food processing mechanical equipment manufacturing. The novel hawthorn fruit pit removing and fruit slicing device comprises chain wheels, a transmission shaft, a transmission device, chains, an object carrying device, a surface slicing device, a machine frame, a crank sliding block device, a pit removal device, a pit removal sifting mesh, and finished product and waste delivery devices; the novel hawthorn fruit pit removing and fruit slicing device is compact in structure and convenient to operate; the device has a complete whole process of hawthorn fruit pit removing and fruit slicing, the efficiency in pit removing and fruit slicing is high, the operation is simple, the demand for manpower is small, and the yield of the product is sharply increased at the same time while pit removal is guaranteed; through a principle of a crank sliding block mechanism, the rotation input by a transmission system achieves the linear reciprocating movement through a crank connecting rod mechanism, so that a power input sliding block passes the energy of an engine to the crank sliding block mechanism; it is guaranteed that the knife blade has a certain velocity, and the damage caused when the knife blade is too slow can be avoided at the same time.