This paper presents our studies on a downlink MUs-MISO URLLC system. First， we propose the problem of optimization design of beamforming at the BS for maximizing the sum-rate. Next， the design is formulated as a non-convex optimization problem， and we propose a computationally-efficient SCA-based iterative algorithm to obtain a suboptimal solution to the design problem. Finally， the performance of the proposed algorithms is analyzed through extensive simulations under various settings of transmit power budget， number of transmit antennas at the BS， transmit bandwidth， and transmit time. The simulation results show that the performance of our proposed algorithm approximates the Shannon transmission rate.