The present application belongs to the technical field of
polymer, and particularly relates to a transparent
thermoplastic elastomer composition with controllable
hardness, comprising
polymer A and
polymer B; the polymer A is SEBS, wherein the EB segment is a hydrogenated
diene polymer segment with a
random structure and / or a 1,2 structure content greater than or equal to 60%; the polymer B is a polymer with full hydrogenation of
aryl and olefin groups in SBS. The present application also includes preparation and application of the composition. The composition can achieve high light
transmittance, low
haze and controllable
hardness effect.