The invention discloses a passage fracturing middle jacking fluid pulse time optimization method, which sequentially comprises the following steps of (1) calculating the diameter of propping agent groups formed in cracks through field construction parameters; (2) building a propping agent group-stratum contact finite element model in ABAQUS software according to the diameter of the propping agentgroups calculated in the step (1) by combining the stratum rock elasticity modulus E, the stratum rock Poisson ratio v, the reservoir thickness L and the stratum closing pressure P; and preferably selecting the optimum laying space Dp1 of the propping agent groups; and (3) calculating the passage fracturing middle jacking fluid pulse time by combining the optimum laying space Dp1 of the propping agent groups obtained in the step (2). The influence of the stratum closing pressure on the middle jacking fluid pulse time is considered, and the stratum rock parameters and the field construction parameters are combined for obtaining the middle jacking fluid pulse time through the sand-carrying fluid pulse time; and the problem that the center jacking fluid pulse time cannot be determined in thefield construction process is effectively solved.