The spatial locations of the beam in spatial resonator gyroscope under different maladjustments were mainly studied. According to theories of Collins′s Integral and Collins′s EIKONAL Function and making full use of the MATLAB software, the beam transmission of RLG was simulated and calculated because of the resonator′s maladjustment. From the simulation results of three different structures, it was found that different mirrors with the same maladjustment cause different results on the beat output, and the beat signals detected from mirror M1 and M2 are different; for the small-gain lasers, the structure using the spherical mirror can easily form the stable beam structure compared with the plane mirror; from the calculated spatial coordinates xn it can be got that the centers of the Gaussian spot of clockwise and counterclockwise wave occur shift and effect the beat output of laser gyros in the certain amount of offset. This work has some instructive significance on the engineering testing and endoscopes adjustment of the laser gyro, and contributes to the improvement of measuring accuracy of laser gyro.