The invention relates to a kit for rapidly detecting a hydrocarbons plasticizer in a silicone sealant and an application thereof. The kit comprises a box body, butyl rubber test paper, a test paper fixing device, testing paper, a pressing module and a box cover, wherein the box body is a through cavity with unsealed two sides; the test paper fixing device is arranged outside the box body; the butyl rubber test paper is flatly fixedly arranged at the bottom of the box body by the test paper fixing device; an ungummed face of the test paper faces to the inner part of the box body; and a gumming face faces to the test paper fixing device and the box cover covers. The testing paper and the pressing module are arranged between the box cover and the test paper fixing device; and the butyl rubber test paper is composed of butyl rubber and a supporting material. In the detection process, a silicone sealant sample to be detected is injected to the box body of the kit filled with the butyl rubber test paper so that the sample and the ungummed face of the test paper are sufficiently contacted to be tested. The disposable kit prepared by the invention can be used for rapidly detecting the hydrocarbons plasticizer in the uncured silicone sealant; and the method is simple and can be used for rapidly judging whether the uncured silicone sealant contains the hydrocarbons plasticizer or not within two hours.