A collaborative evolutionary optimization method for the layout of hydraulic manifold blocks was presented according to its structure feature, an optimization design mathematic model of manifold blocks in the spatial layout was established, and it was solved based on the ant colony algorithm. Special mention was given here to demonstrate the improvement of current multiple ant colony collaborative evolutionary algorithms on transfer policy and rules of heuristic information which was made to Cooperative arrangement for hole routing. Finally, the simulation was carried out with MATLAB to verify the feasibility of the improved algorithm. The results of the simulation indicated that the improved algorithm was more available than the existing ant colony algorithms Introduction Hydraulic Manifold Blocks (HMB) which are the carrier to install many kinds of cartridge valve, the plate valves and other accessories, so they are the centre of the integrated hydraulic system. They assemble the control valve into "integral line" instead of the traditional external connection. They are characterized by compact structure, small vibration, and convenient installation and debugging. Nevertheless, the features of hole design are low efficiency and error-prone due to the nonstandard hydraulic system and the diversity of the hole connecting relationship with the manifold piece of internal hole often constitute a hole of interchange, dense complex network [1][2]. Manifold valve block structure is so complex that it is difficult to carry on the optimization design even with those CAD software presented in the papers available discussing on the same problem. HMB optimization is divided into two parts according to the design characteristics of HMB, one is hydraulic components integrated block outer layout optimization, and the other one is internal route optimization. External layout optimization enable HMB to be the smallest with the premise of no interference between their components, while internal hole routing optimization has the advantage of the least cope hole of the single route and shortest total route with the premise of safety wall thickness[3]. Traditional hole routing optimization on simplex line is just the shortest path optimization, while the influences exerted by the hole order were ignored. The main objective of this study is to improve the algorithm for an efficient hole routing optimization, which not only realize the collaborative optimization of hole routing, but also guarantees algorithm a fast convergence rate. Space holes arrangement optimization model Integrated Space Holes Arrangement Optimization Model The whole process of traditional hole connecting design is based on the experience or CAD, it is characterized by low efficiency and poor accuracy. Although the holes inside the HMB were various and complex in connecting relation, hole position parameters on the block is definite after the valve components layout on the HMB. The connecting design is proposed as follows: Determine the depth of the hole on either side if the hole can be directly connected to the end. Increase the hole number if the hole cannot be connected to the end directly to decrease the process hole number and length of route. Verify the hole in the circumstances of various route layouts to prevent interference. International Conference on Advances in Mechanical Engineering and Industrial Informatics (AMEII 2015) © 2015. The authors Published by Atlantis Press 1708 In summing up what were described above can be derived the mathematical model for internal hole routing optimization design of HMB. ( , , , , , ) ( 1,2,...,5) ( , ) ( 1,2,..., ) ( , , , , , ) ( 1,2,..., ) ( , , , , , ) ( 0,1,..., ) T k k k k k k k T t