Composite filter element for water purifier and water purifier

The composite filter element comprises a lower shell, a middle shell, an upper shell and a filter material assembly, and a first connector and a purified water outlet are formed in the top and the bottom of the lower shell respectively; the middle shell comprises a shell body and a nylon net, a first grid opening is formed in the side face of the shell body, the nylon net wraps the first grid opening, a middle shell opening is formed in the bottom, and the whole middle shell is buckled to the first connector of the lower shell. The upper shell sleeves the middle shell and is connected with the lower shell; the filter material assembly is arranged in the lower shell and comprises a particle filter material and an ultrafiltration membrane. According to the technical scheme, the structure is simple, installation is convenient, the distribution mode that the ultrafiltration membrane is arranged in the middle and the periphery of the ultrafiltration membrane is filled with the particle filter materials is adopted,