Wireless sensor networks（ WSNs） is often deployed in harsh environment and node can be easily captured or damaged

wireless multi-hop communication method also makes network more vulnerable to various kinds of signals interference and attacks

routing security is particularly important.On the basis of clustering routing protocol

reliable routing model of WSNs based on fuzzy trust is proposed.In this mode

trust value of earch node is obtained by residual energy

packet forwarding rate

routing information distortion and honesty degree

using variable weight fuzzy comprehensive evaluation algorithm.Simulation result shows that in variable weight fuzzy comprehensive evaluation algorithm

by improving weighting of attribute with too low value

nodes with some defective can be avoided choosing as cluster head

and avoid the behavior of malicious network routing node destruction.