Galaxy evolution in substructures of A2142

A2142 is a massive galaxy cluster at low redshift, which contains a large number of galaxies at different stages of galaxy evolution．The spectral and photometric data of A2142 were systematically sorted out in this article．Substructure was obtained with Blooming tree algorithm, the galaxies in the field of A2142 were divided into three types:non substructure galaxies, substructure galaxies and outskirts galaxies．Their distribution, star formation activity, D_n4000 and other physical properties were studied, the galaxies in the A2142 were found to have an obvious radial evolution trend．If the galaxies fall from the cluster outskirts to the cluster center, their evolution is not only affected by ICM in the galaxy cluster, but also modulated by the substructure．