Characteristics of the mulch film contamination in typical areas of North China was primarily investigated. The investigation results showed that the amount of mulch film residues were respectively 5.629, 7.369 and 2.822 kg·hm~(-2) in the soil of the plastic film greenhouse, vegetable field and crop field for the sampled areas of Hebei Province, and the level of mulch residues were respectively 4.169, 3.682 and 2.430 kg·hm~(-2) in the soil of plastic film greenhouse, vegetable field and crop field for the s...