The invention discloses a method for removing network carbide in an H13 mold steel annealing microscopic structure. The method comprises the steps that H13 mold steel enters a furnace after forging orbefore quenched-tempered heat treatment, the mold steel is heated to 1030+/-10 DEG C at the speed smaller than or equal to 100 DEG C/h, heat preservation is carried out for 8 to 10 hours, after heatpreservation, the temperature rises to 1070 to 1100 DEG C, heat preservation is carried out for 6 to 8 hours, after discharging, the steel is put into water for quenching within 8 minutes, after quenching, heat preservation is carried out at the temperature of 200 to 500 DEG C, the temperature rises to 650 to 750 DEG C to be subjected to heat preservation for 2 to 5 hours, the temperature continues to rise to 850 +/-10 DEG C at the speed smaller than or equal to 100 DEG C/h, and heat preservation is carried out for 30 to 40 hours; and the furnace is cooled to 650 to 730 DEG C, and heat preservation is carried out for 15 to 20 hours, and furnace discharging is achieved. The network carbide in the H13 mold steel annealing microscopic structure can be thoroughly removed, and the comprehensiveperformance of the mold steel can be improved.