With feature size scaling down, the influence of crosstalk on single event effect becomes more important. In order to analytically describe the influence of crosstalk effect on single event transient (SET), based on the equivalent circuits of SET and 6-node template model for interconnects, by using defined four rules of point admittance to simplify the calculation, the analytical model for single event crosstalk (SEC) is deduced. Through differentiating and Taylor series expansion theorem, the expression for the peak value of crosstalk voltage is achieved. The simulation results show that the analytical model is well consistent with SPICE circuits and average relative error is 2.51%, and max error is 5.11%.