  As an essential application of quantum mechanics in classical cryptography,
quantum secret sharing has become an indispensable component of quantum
internet. Recently, a differential phase shift quantum secret sharing protocol
using a twin field has been proposed to break the linear rate-distance
boundary. However, this original protocol has a poor performance over channels
with asymmetric transmittances. To make it more practical, we present a
differential phase shift quantum secret sharing protocol with asymmetric source
intensities and give the security proof of our protocol against individual
attacks. Taking finite-key effects into account, our asymmetric protocol can
theoretically obtain the key rate two orders of magnitude higher than that of
the original protocol when the difference in length between Alice's channel and
Bob's is fixed at 14 km. Moreover, our protocol can provide a high key rate
even when the difference is quite large and has great robustness against
finite-key effects. Therefore, our work is meaningful for the real-life
applications of quantum secret sharing.
