The invention relates to the technical field of environmental protection, and discloses a lever principle based environment-friendly garbage can increasing the utilization space and adopting dry and wet separation. The lever principle based environment-friendly garbage can increasing the utilization space and adopting the dry and wet separation comprises an outer can, a bottom column is movably connected above an inner can, through the cooperation use of the inner can, the outer can and a top cover, the inner can can be rotated individually through treading a pedal, moisture in garbage is discharged, and when the cleaning is conducted, only the pedal is treaded, the cleaning can be conducted, so that the operation is convenient and rapid; through the cooperation use of the pedal, a gear and a rack, when the pedal is treaded downwards to finally drive the inner can to rotate and a pressing rod reciprocates up and down, the garbage in the garbage can is compacted, the utilization space is increased, more environment friendly is achieved, a rotating plate is driven to rotate, water in the inner can is threw away, the inner can does not rotate when the pedal moves upwards, the step isreputedly conducted, the water is separated finally, the situations that the bacteria bred in a humid environment and the odor of the garbage is emitted into the air to influence the surrounding environment are prevented, and the design of the garbage can is more environmentally friendly and intelligent.