The present invention discloses a compound represented by formula (I), or an optical isomer, a pharmaceutically acceptable salt, a prodrug, a hydrate or a solvate thereof. In the formula (I), R1-R10 are respectively and independently selected from H, D, and are not all H. Compared with a non-deuterated control compound MGL3196, the compound or the optical isomer, the pharmaceutically acceptable salt, the prodrug, the hydrate or the solvate of the compound provided by the invention have the advantages that the agonistic activity on thyroid hormone receptor beta (THR-beta) is better; half-life period is longer, clearance rate is higher, metabolic stability and pharmacokinetic properties are better, and the application prospect in preparation method of THR-beta agonists, and medicines used for treating THR-beta agonist adaptation diseases including dyslipidemia, hypercholesterolemia, non-alcoholic steatohepatitis (NASH) and non-alcoholic fatty liver disease (NAFLD) is promising.