The invention discloses a
radiation-resistant reinforcing method for an on-
satellite reconfigurable FIR filter. The method comprises the steps of firstly acquiring the bit width of the filter, and performing reinforcement or not according to conditions, wherein when the bit width is expanded, occupied BRAM is increased and the idle BRAM cannot be provided, reinforcement is not performed, and when the bit width is expanded and the occupied BRAM is unchanged, or when the bit width is expanded and the residual idle BRAM is provided,
radiation-resistant reinforcement is performed on the parameter of the reconfigurable filter on the ground; and then acquiring the number of on-
satellite idle multiplying units, the number of on-
satellite idle Slice resources, and the number of the multiplying units and the number of Slice resources used by the filter, if the number of the on-satellite idle multiplying units is not less than the sum of 1 and the number of the used multiplying units, and the number of the idle Slice resource is more than or equal to the product of the number of the used Slice resources and (1+1 / n), using the filter to achieve
radiation-resistant fault detection and correction of a circuit, and if no idle multiplying unit is provided or the number of the idle Slice resources is less than the quotient of the number of Slice resources and n, using the filter with
low resource consumption to achieve radiation-resistant fault detection of the circuit, and otherwise using the filter with the single multiplying unit to achieve radiation-resistant fault detection of the circuit.