The invention discloses a flexible net injection mold. The flexible net injection mold comprises a fixed mold core (1) and a movable mold core (2), wherein a cavity (11) is formed on the fixed mold core (1), a sliding block (2) capable of sliding towards or deviating from the cavity (3) is arranged on the fixed mold core (1), and a sound aperture insert core (121) for adsorbing the flexible net body (3) is arranged on the sliding block (12); the sliding block can be configured as follows: the sliding block (12) drives the sound aperture insert core (121) to move to a position of the cavity (11) in mold closing, and the flexible net body (3) is propped against the corresponding end surface of the cavity (11). The flexible net injection mold can enable the flexible net body to integrate with the product through the injection molding, the injection molding is solid and reliable and not liable to produce falling-off and other bad phenomenon. And the assembling is unnecessary, the mounting step is saved, the production time is saved, and the production efficiency is improved.