In order to explore the effects of cover cultivation, exposure and landfill treatment on different types of film degradation characteristics and growth and yield of maize, a biodegradable film evaluation experiment was carried out in Zhongyuan Town, Qionghai City, Hainan Province. The results showed that the cover cultivation, exposure and landfill had different effects on the degradable mulch film. BD₁ degradable mulch film had the fastest degradation rate in the three tests. BD₂ and BD₃ degradable mulch film followed, BD₄ the worst, the degradation rate of the sun exposure can be 50 days earlier than other regions. Covering ordinary PE film and degradable film treatment had no significant effect on the growth period and growth cycle of maize growth, but the coverage of the film could shorten the corn growth cycle by 8 days. The average yield of the covered mulch film increased by 31.02% compared with the uncoated film. The four degradable mulch films had different degrees of yield reduction compared with the ordinary PE film.