Plastic deformation of amorphous alloys below the glass transition temperature is inhomogeneous and highly localized within narrow shear bands. However, the processing and manufacturing of amorphous alloys in their supercooled liquid state exhibit unique advantages for engineering application. Although the discovery of bulk metallic glasses has substantially expanded the processing time and temperature window, experimental research on the supercooled liquid states of amorphous alloys remains widely limited to narrow regions near either their glass transition temperature or melting point. The crystallization of supercooled liquids severely limits the characterization of their kinetic behavior in the high-temperature region. Therefore, an enhanced comprehensive understanding of supercooled liquid characteristics and crystallization kinetic behavior of metallic glasses is necessary. Zr₆₁Ti₂Cu₂₅Al₁₂ amorphous alloy shows broad application prospects in the fabrication of flexible mechanism components and biological implants because of its high fracture toughness, high elastic strain limit, and good biocompatibility properties. Six orders of magnitude (10^-2-10⁴ K/s) of heating rate changes were achieved for Zr₆₁Ti₂Cu₂₅Al₁₂ metallic glass by combining flash differential scanning calorimetry (FDSC) with conventional DSC. This implies that the kinetic characteristics of the alloy supercooled liquid is dependent on the heating rate of the alloy over an ultra-extensive temperature range. The kinetic behavior of the alloy supercooled liquid lags behind the rapid changes in temperature, and both follow the Vogel-Fulcher-Tammann equation. The small variation in the fragility index (m = 35-47) indicates that the supercooled liquid structure changes gently with temperature, thereby showing a “strong” liquid behavior. An average m ≈ 45 is obtained over the entire temperature range from the glass transition temperature to the melting point via time dimension coordinate translation. The dependence of crystal growth on temperature during the crystallization process of the Zr₆₁Ti₂Cu₂₅Al₁₂ amorphous alloy indicates that the activation energy of crystal growth gradually decreases with increasing temperature, and the reduction in activation energy per unit temperature obtained here is approximately 0.5 kJ/(mol·K). Near the glass transition temperature, decoupling occurs between crystal growth kinetics and viscous flow. The kinetics coefficient for crystal growth (U_kin) follows a power law relationship with viscosity (η) over a wide temperature range when an exponent ξ = 0.84 is introduced: U_kin ∝ η^-ξ.