The invention discloses a dual component curing type putty for mixed nuclear radiation environment. The putty which comprises a component A comprising a matrix resin, a s functional filler for shielding and a functional assistant and a component B curing agent is prepared by sequentially weighing the matrix resin, the functional filler for shielding and the functional assistant in proportion, stirring them at normal temperature to uniformly mix them to prepare the component A, adding the component B, stirring at normal temperature to uniformly the component A and the component B, and allowing them to stand for 0-1h. The putty which allows curing to be carried out at normal temperature and contains no volatile solvents can be conveniently used in a mixed radiation field of neutrons and gamma-rays, and can also be used to block and bond polyolefin shielding material slits and grooves, and the putty which has good shielding performances on the neutrons and the gamma-rays is suitable for the popularization and the application.