The invention relates to a resin composition for temperature control indication. The resin composition comprises the following ingredients, by weight: 10-90 parts of thermoplastic resin, 10-90 parts of thermoplastic elastomer, 0-5.0 parts of compatilizer, 0.1-5.0 parts of sheet pigment and 0.1-2.0 parts if processing auxiliary agent. Compared with a prior art, the thermoplastic resin composition prepared by the invention can be used for temperature control and alarm indication; compared with traditional temperature display methods of electron microprobe, infrared radiation and mercury thermometer, the preparation method has advantages of simpleness, effectiveness, sensitive reaction and low cost, can be widely applied to temperature control alarm of large and small machinery equipment and apparatuses and has huge market prospect in fields of machinery and material processing, chemical engineering, electronic apparatus and monitor on various experiment processes, etc.