The invention discloses tough plastic composition. The tough plastic composition is prepared from components in parts by weight as follows: 100 parts of polyvinyl chloride resin, 40-50 parts of a plasticizer, 7-12 parts of tribasic lead sulfate, 2-4 parts of barium stearate, 3-7 parts of phosphate, 0.5-1 part of C16-C18 alcohols and 0.7-1.2 parts of aluminum hydroxide particles. With the adoption of the scheme, the tough plastic composition can be used at the lower temperature, is not prone to embrittlement and deformation, keeps the performance unchanged after being used for a long time, has very high shock resistance and is widely applied in low-temperature environments.