The influences of gauge blocks gestures on calibration of coordinate measuring machine attach increasing attention. In particular, the effects of gauge blocks gestures on metrology coordinate measuring machine of which the measurement accuracy is hyper-0.6 μm+1000/L cannot be ingnored. Adopting laser interferometer as measuring datum, length deflection of gauge blocks are measured in different gestures by developing an adjustable platform. An advance multi-point bracing means is proposed to minish length variation of gauge blocks. The results of experiments indicate that the maximum length deflection of gauge blocks is +0.21 μm by adopting multi-point bracing means. According to the formula of error uncertainty for coordinate measuring machine the standard uncertainty is recalculated to be 0.75 μm.