The present invention relates to an oxyhydrogen electrolytic cell with high efficiency which includes a housing, a subbase, an upper cover, N+1 metal electrode plates, an electrolysing solution ingress pipe, an electrolysing solution and gas eduction tube, N*M upper cover manifold assembly, N*M subbase manifold assembly, two electrode connection bolts, two electrode connection bolts are installed on the housing, the subbase is equipped with the electrolysing solution ingress pipe connecting with the subbase manifold assembly, the upper cover is equipped with the electrolysing solution and gas eduction tube connecting with the upper cover manifold assembly, four edges of N+1 metal electrode plates are beset in the upper cover, the housing and the subbase with same interval, an electrolysing small chamber communicates with the upper cover manifold assembly and the bottom manifold assembly distributed evenly, the first and the N+1 th electrode plate connects with a positive pole and a cathode pole through two electrode connection bolts respectively. The manifold assembly has little and relative long diameter, each metal electrode plate generates little side road parasitic current through the electrolysing solution in the manifold assembly, accordingly, reduces consumption and increases electrolytic efficiency.