An energy-saving environment-friendly toothpaste bottle consists of a transparent tube, a bottle nozzle, a big piston, a big piston push rod, a small piston, a small piston push rod, a bayonet lock and a protective cover, wherein the bottle nozzle is arranged at the end part of the transparent tube; the bottom end of the transparent tube is sealed through a detachable hard rubber plug; a bottle plug is arranged on the bottle nozzle; the big piston is arranged in the transparent tube; the small piston push rod penetrates the detachable hard rubber plug, and is connected with the big piston; a hole is formed in the center of the big piston; the small piston is embedded in the hole in the center of the big piston; the small piston push rod penetrates through the center of the big piston push rod, and drives the small piston to move in the middle of the big piston; the bayonet lock is arranged on the small piston push rod. The device is simple, aesthetic, and convenient to use, resource and energy cannot be wasted, and can be quickly recycled; paste can be fully utilized without residue, the operation is simple, and pistons can be quickly replaced after the package is recycled by a manufacturer; the energy can be saved, and the package can be recycled without waste, so as to be completely adapt to the environmental protection and energy conservation idea requested in the prior art.