The invention relates to an XNOR-XOR double-rail pre-charge logic unit and belongs to the field of circuit electronics. The XNOR-XOR double-rail pre-charge logic unit comprises a single-rail XOR logic circuit and a single-rail XNOR logic circuit complementing the single-rail XOR logic circuit. The two circuits are each provided with four input ends respectively connected with four input signals a, a<->, b and b<->; the output signal y of the single-rail XOR logic circuit is an XOR logic result of the input signals a and b; and the output signal y<-> of the single-rail XNOR logic circuit is an XNOR logic result of the input signals a and b. According to the invention, under the condition of not large area expenditure, power consumption of nodes inside a logic unit can be effectively balanced, the memory effect of the internal nodes is eliminated, the problem of early spreading effect of the XNOR-XOR double-rail pre-charge logic unit is effectively solved, and safe and effective XNOR-XOR logic is realized.