In order to give full play to the advantages of compact all-solid-state lasers, a compact straight cavity 457 nm blue laser system is designed. Based on the nature of the Nd:YVO4, the analysis of laser threshold of quasi-three-level laser system and the parameters optimization of resonator cavity are obtained. The laser of Nd:YVO4 operation at 914 nm and its 457 nm second harmonic is realized by intracavity frequency doubling with BIBO nonlinear crystal. The highest output power at 457 nm reaches 1.56 W with an incident pump power of 24.2 W, and the optical-to-optical conversion efficiency is higher than 6.45%, also the fluctuation of the blue output power is less than 2.98% and M2 factor is 1.3.