  We report on the noise properties of high-energy mid-infrared supercontinuum
(MIR-SC) generation in normal dispersion multimode fibers from the numerical
perspective. Noise amplification in multi-modes is primarily due to the
stimulated Raman scattering (SRS) effect. This leads to the emergence of
"incoherent cloud formation" and "incoherent optical wave breaking", similar to
those observed in single-mode fibers. Increasing the pump technical noise from
0.1 % to 1 % significantly shortens the lumped coherence length L_C and
exacerbates the influence of incoherent broadening dynamics competing with
coherent dynamics, resulting in MIR-SC being a strong consistency in the
collapse evolution of amplitude noise and phase coherence. To minimize this
noise amplification and achieve high-energy low-noise MIR-SC in practical
applications, it is essential to use short-pulse pumping with low amplitude
noise, ensuring that L_C>>L_OWB (where L_OWB denotes the optical wave breaking
length).
