In slow speed rendezvous simulation test on one channel of each of the two laser fuzes, it is found that the start-up performance of the two channels under the same rendezvous conditions differs greatly. In this paper, the performance of of two fuzes' transmitting and receiving components are tested and compared with the distance cut-off test results. It is found that the performance of two fuzes' receiving components is comparable in terms of responsiveness, and the optical power of transmitting components has a greater impact on the cut-off distance of the fuzes.