The invention provides a static-state pipeline three-phase mixer and application thereof. The static-state pipeline three-phase mixer comprises a pipe section, wherein a liquid inflow pipe, a liquid-solid inflow port and a gas inflow port which are communicated with the inside of the pipe section are sequentially arranged along the pipe section, the liquid inflow pipe is arranged inside the inlet end of the pipe section, the liquid-solid inflow port is located above the pipe wall, and the gas inflow port is located below the pipe wall. The zone behind the liquid inflow pipe and located between the liquid-solid inflow port and the gas inflow port is a two-phase mixing zone pipe section, the zone behind the gas inflow port is a three-phase mixing zone pipe section, the zone between the pipe section and the liquid inflow pipe is a temperature control chamber, and the temperature control chamber is communicated with a temperature control medium inlet and a temperature control medium outlet respectively. The static-state pipeline three-phase mixer is simple in process, safe in operation and good in mixing effect.