Foot trajectory planning problem of creeping robot is a multi-dimensional and complex problem which is hardly to solve.Therefore,adaptive step fruit fly optimization algorithm (ASFOA) is proposed and used to solve this problem.The changeless step in fruit fly optimization algorithm (FOA) is instead by adaptive step which used in ASFOA,and the ability of the algorithm to break away from the local optimum and to find the global optimum is greatly enhanced.Experimental results of several typical functions show that ASFOA has the advantages when compared with FOA.In the practical application of fo...