With the continuous development of distributed energy technology and the in-depth reform of the power system, the distribution network will show the characteristics of multi -stake- holders. In order to characterize the interest needs and technical characteristics of different stakeholders, while realizing the multi- venergy coupling of cooling, heating, and electricity in the distribution network, as well as the balance of power and electricity, and maintaining the safe and stable operation of the power system, the analysis target cascading theory is adopted to study the problem of collaborative optimization scheduling of network operators, distributed energy suppliers, combined cooling heating and power type load integrators under the market environment. Modeling the technical operating characteristics of the multi-energy elements within each subject, as well as the interrelationship between the subjects and the existence of different interest appeals, each subject performs collaborative optimization by exchanging contact variable information and finally converges. Lastly, the model and algorithm are verified based on the example of IEEE33 distribution network system.