In recent years, there have been more and more researches on fault current limiters. Pressure-controlled materials with piezoresistive effect can be used in current transfer type fault current limiters. Titanium diboride powder is a material with piezoresistive effect, and its resistance is negatively correlated with pressure changes. In the current transfer type fault current limiter, The pressure-controlled materials is the main branch of the current transfer circuit. A large amount of heat will be generated in the steady-state current working state, in turn, the temperature rise in the pressure-controlled materials container continues to increase. On the one hand, excessive temperature rise will affect the resistance of the titanium diboride powder, resulting in the actual flow capacity not reaching the design standard; On the other hand, the accumulation of heat in the material will accelerate the aging of the material and the outer container, thereby reducing the actual service life and even affecting the material's insulation performance and causing safety hazards. This article focuses on the characteristics of the piezoresistive effect of titanium diboride powder, use permanent magnet-repulsive mixing mechanism to provide holding pressure for it. Study the long-term through-flow heat effect with pressure under the cylindrical parallel through-flow container. According to its heating and structural characteristics, several heat dissipation methods are proposed in combination with simulation, and the experiments are carried out. Through simulation and experimentation, The installation of vertical heat sinks and the simultaneous application of industrial fan cooling can effectively reduce the current heating effect. It has important guiding significance for its use in the field of current transfer and current limiting to achieve long-term current flow.