As a kind of new light power transmission medium, liquid-core optical fiber has a lot of prominent advantages. The comparative advantages of a liquid-core optical fiber to a conventional high power fiber bundle were introduced in detail. For transmitting UV-laser, the transmissivity of excimer laser in liquid-core optical fiber was measured for excimer laser of wavelength 248 nm and 308 nm. The dependences of transmission characteristics on laser output parameters, such as pulse energy(1～5 mJ), wavelengh (248 nm/308 nm), average power (2～20 mW), etc., were analyzed. The results are useful for transmission of excimer laser in liquid-core optical fiber.