In order to improve the service level of port authority and reduce the operational cost at the same time,we probe into the yard cranes scheduling problem in multiple blocks in a fixed period under mixed storage mode.Considering YCs resource sharing among the blocks and the workload balance of YCs and their relationship with the internal and external trucks,we propose a non-liner mathematical model of yard cranes joint scheduling in mixed storage yard for the objective of minimizing the total cost of yard cranes’ moving,turning cost and the waiting cost of the trucks involved.A two-part chromosome representation is presented based on the handling sequence and workload of YCs,then an IGA with the embedding of the available space split strategy and chromosome correction technology is proposed to solve the problem.The results from the empirical analysis seem quite well,which proves the feasibility and validity of the model and IGA.