To investigate the motion mechanism and kinetic energy loss characteristics of particles in horizontal-vertical upward bend pipe,different curvature radii, gas velocities, and particle mass flow rates are used to study changes in particle velocity, the inter-particle contact force, and the particle-wall contact force in this study. The results indicate that larger curvature radii weaken the inter-particle contact force. The velocity difference between particles inside and outside of the bend first increase then decreases at the elbow. Increasing the gas velocity increases the particle velocity and the particle-wall contact force and the velocity difference between the inner and outer particles of the bend and weaken the inter-particle contact force. As the mass flow rate increases, the particle-wall contact force gradually increases at 0 ° -30 ° of the bend, gradually decreases at 30 ° -90° of the bend, and the inter-particle contact force enhance. The higher the gas velocity, the greater the loss of particle kinetic energy caused by collisions. The velocity difference between the inner and outer particles of the bend remains basically unchanged. The maximum the inter-particle and particle-wall contact force is around the 30° bend angle.