In this paper, we study the oscillation of solutions for an even-order differential equation with middle term, driven by a p-Laplace differential operator of the form {(r(x)Φp[z(κ−1)(x)])′+a(x)Φp[f(z(κ−1)(x))]+∑i=1jqi(x)Φp[h(z(δi(x)))]=0,j≥1,r(x)>0,r′(x)+a(x)≥0,x≥x0>0.\\documentclass[12pt]{minimal}\t\t\t\t\\usepackage{amsmath}\t\t\t\t\\usepackage{wasysym}\t\t\t\t\\usepackage{amsfonts}\t\t\t\t\\usepackage{amssymb}\t\t\t\t\\usepackage{amsbsy}\t\t\t\t\\usepackage{mathrsfs}\t\t\t\t\\usepackage{upgreek}\t\t\t\t\\setlength{\\oddsidemargin}{-69pt}\t\t\t\t\\begin{document}$$ \\textstyle\\begin{cases} ( r ( x ) \\Phi _{p}[z^{ ( \\kappa -1 ) } ( x ) ] ) ^{\\prime }+a ( x ) \\Phi _{p}[f ( z^{ ( \\kappa -1 ) } ( x ) ) ]+ \\sum_{i=1}^{j}q_{i} ( x ) \\Phi _{p}[h ( z ( \\delta _{i} ( x ) ) ) ]=0, \\\\ \\quad j\\geq 1, r ( x ) >0, r^{\\prime } ( x ) +a ( x ) \\geq 0, x\\geq x_{0}>0. \\end{cases}$$\\end{document} The oscillation criteria for these equations have been obtained. Furthermore, an example is given to illustrate the criteria.