Split type air purifier and filter module thereof

The invention provides a split type air purifier and a filter module of the split type air purifier. A draught fan is arranged on an outdoor case, the filter module is arranged in an indoor case, the outdoor case is provided with a fresh air port, a return air port is independently formed in the position far away from the indoor case rather than being formed in the indoor case, positive pressure and large-range air circulation are formed, and indoor air flows to the outside only through gaps. The purifier further comprises an spherical air port, an adjustable grid plate type fresh air port, a module pressing-down mechanism and a touch screen, the filter module is a combined module capable of being freely combined, an early-effect filter module is made of bag type multi-layer non-woven fabrics, a formaldehyde removing, benzene removing, TVOC removing, degerming and deodorizing filter module is designed by adopting secondary cellular activated carbon, an efficient HEPA filter module is made of efficient H13 and